taxonID	type	description	language	source
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	description	Figs 1 B, I – J, P, 2, 3 H – I, 4 A, 5 H	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	materials_examined	Type: FIJI • Viti Levu, Mba Province, vicinity of Nandarivatu; 17 Nov. 1927; Gillespie 3841; holotype: AMES [AMES 00243052].	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	etymology	Etymology The epithet refers to the carina of the lip.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	materials_examined	Material examined NEW CALEDONIA – Province Nord • Mont Mandjelia, Pouébo; 20 ° 23 ′ 51 ″ S, 164 ° 31 ′ 57 ″ E; 21 Feb. 2016; fr.; C. Laudereau 97; NOU [NOU 090363] • Cultivated in Nouméa; C. Laudereau 172; (original material data: Roches de la Ouaième; 20 ° 38 ′ 22 ″ S, 164 ° 51 ′ 47 ″ E, 6 Dec. 2016); NOU [NOU 090377] • Roches de la Ouaième, Hienghène; 20 ° 38 ′ 22 ″ S, 164 ° 51 ′ 47 ″ E; 22 Oct. 2018; fr.; C. Laudereau 1075; NOU [NOU 090364] • Ouane Batch, Pouébo; 20 ° 30 ′ 35 ″ S, 164 ° 43 ′ 56 ″ E; 23 Dec. 2018; C. Laudereau 1112; NOU [NOU 090365] • Mont Mandjelia Pouébo; 20 ° 23 ′ 51 ″ S, 164 ° 31 ′ 57 ″ E; 24 Dec. 2018; fr.; C. Laudereau 1156; NOU [NOU 090366] • Grande-Terre, Pouébo: Mont Mandjélia; [20 ° 24 ′ 2 ″ S, 164 ° 31 ′ 42 ″ E]; alt. 750 m; 7 Jun. 1979; H. S. MacKee & Bégaud 36986; P [P 00118407] • Pouébo: Mont Mandjélia; [20 ° 24 ′ 2 ″ S, 164 ° 31 ′ 42 ″ E]; alt. 750 m; humid forest, schists, 26 Jan. 1980; H. S. MacKee 37759 & Bégaud; P [P 00118408] • Roches de la Ouaième, on the crest; [20 ° 38 ′ 17 ″ S, 164 ° 52 ′ 0 ″ E]; alt. 765 m; 4 Nov. 2011; fr.; J. Munzinger 6162, V. Hequet, A. Vandrot, Ph. Birnbaum & I. Pounds; NOU [NOU 063339] • Cascade La Guen; 20 ° 37 ′ 0 ″ S, 164 ° 46 ′ 53 ″ E; humid forest; st.; 21 Nov. 2010; J. Munzinger 6401, P. Lowry, M. Callmander, H. Vandrot, T. & M. Teimpouene; NOU [NOU 063581]. – Province Sud • Mont Koghi; [22 ° 10 ′ 55 ″ S, 166 ° 30 ′ 19 ″ E]; alt. 500 m; humid forest; Jan. 1979; H. S. MacKee 43003 & Labrissière; P [P 00118409] • Mont Pembai; [21 ° 34 ′ 47 ″ S, 165 ° 49 ′ 59 ″ E]; alt. 700 m; humid forest, schists; 31 May 1990; H. S. MacKee 44925; P [P 00124752, P 00124753].	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	description	Description Herb, epiphytic, erect. Roots whitish, ca 1 – 2 mm wide, at the base of the plant (axillary roots lacking). Stem erect, to 50 cm long, terete or slightly flattened, covered by the sheath of the oldest leaves, blades remaining only in the upper third of the adult stem. Internodes 25 mm long at the base of the stem. Leaves green, shiny above. Blade 49 × 3 mm. Midrib slightly prominent. Two lateral veins visible, <1 mm from the margin (see discussion of anatomy below). Secondaries prominent, convergent at the apex. Base slightly narrower. Apex rounded or emarginate and asymmetrical. Sheath striated in the upper half and ending by a beak opposite to the lamina and applied on the stem. Inflorescence very short, 1 - flowered. Ovary non-resupinate. Floral buds white, flower white to bright yellow when open, fleshy. Tepals with a red terminal dot. Dorsal sepal triangular, 4.5 mm long, 3 mm wide at the base, with 5 nerves. Lateral sepals triangular-ovate, oblique, ca 4 × 2.4 mm, with 8 nerves. Petals ovate, asymmetrical, ca 4 × 2 mm, with 3 nerves. Lip white, entire, rectangular, ca 4 × 2.8 mm, with 5 – 7 nerves, 3 on the carina and 2 – 4 lateral. Apex triangular, rounded to obtuse. Carina ca 1 mm wide. Column 1.8 mm high and 1.5 mm wide. Fruit globose, ca 6 × 9 mm. Dried seed with transparent testa of 217 × 48 μm, fusiform, with extremity and base slender. Right extremity slightly spiral. Hydrated seed ovate, sacciform. Cells cubic to polygonal, with extremities rounded, ca 48 – 100 × 5 μm, with edges thick, roughly spiral, with smooth cellular walls. Embryo spherical, ca 12 μm in diameter.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	distribution	Distribution and ecology Dendrobium unicarinatum grows in Fiji and in New Caledonia dense humid forest (500 – 750 m), as an epiphyte on trunks (at the base or at several metres high) and can be very abundant, especially on palms. C. Laudereau (pers. comm.) separates two populations by habit and light exposition: the first erect and in sunny situations, the other pendulous, in shade.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	discussion	Taxonomic notes In New Caledonia, D. unicarinatum can be easily identified by a cylindrical or slightly flattened stem, 1 - flowered inflorescence and white, non-resupinate flowers. Leaf section shows D. unicarinatum to be the only graminoid New Caledonian Dendrobium having large, obvious and numerous (> 20) supernumerary fibre bundles on both sides, and having the largest vascular bundle in position 2.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	biology_ecology	Phenology Further observations are needed to determine the flowering and fruiting periods. In the available herbarium material, flowers were observed on cultivated plants (grown in New Caledonia) in January and in the field from February to March, and fruits in May to January.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF8DFFA8FDDA535963A7FC03.taxon	conservation	IUCN status This species was not recognized in New Caledonia until now, and was evaluated as Data Deficient (DD) by the New Caledonian Red List Authority.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	description	Figs 1 E, M – N, Q – R, 3 A – B, 4 Bb, 5 A – B, 6	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	materials_examined	Type: NEW CALEDONIA • Balade; Vieillard 1332 (nec 1192); lectotype: W, here designated; isolectotype: P [P 00124865]!. Material examined NEW CALEDONIA – Deplanche 528 bis; P [P 00124867, P 00124868] • Legand 4888; P [P 00124869] • s. loc., cultivated in Parc E. Liais, Cherbourg-en-Cotentin; 5 Apr. 2003; M. Pignal 2046; (original data: collected alive in 1985 in New Caledonia); P [P 00777178]. – Province Nord • Haute vallée de la Tchamba; [21 ° 1 ′ 55 ″ S, 165 ° 13 ′ 36 ″ E]; alt. 100 – 200 m; gallery forest, near the river; 28 Dec. 1965; H. S. MacKee 13753; P [P 00124850] • Haute vallée de l’Amoa (exploitation forestière Létocart); [21 ° 0 ′ 2 ″ S, 165 ° 14 ′ 31 ″ E]; alt. 300 – 500 m; humid forest; 13 Jan. 1966; H. S. MacKee 14228; P [P 00124838, P 00124849] • Haute Amoa; [20 ° 58 ′ 24 ″ S, 165 ° 10 ′ 21 ″ E]; alt. 50 – 100 m; humid forest; 20 Nov. 1967; H. S. MacKee 17984; P [P 00124846, P 00124874] • Haute Tchamba (exploitation forestière Letocart); [21 ° 1 ′ 11 ″ S, 165 ° 13 ′ 46 ″ E]; alt. 500 m; humid forest; 21 Nov. 1967; H. S. MacKee 17991; P [P 00124872] • Mont Ignambi (north-east slope); [20 ° 27 ′ 11 ″ S, 164 ° 35 ′ 50 ″ E]; alt. 900 m; humid forest on schists; 8 Nov. 1971; H. S. MacKee 24639; P [P 00124845] • Ponérihouen: east buttress of Mont Aoupinié; [21 ° 11 ′ 0 ″ S, 165 ° 17 ′ 48 ″ E]; alt. 700 – 850 m; humid forest on grauwackes; 28 Jun. 1972; H. S. MacKee 25626; P [P 00124844] • Farino, Pic Vincent; [21 ° 2 ′ 48 ″ S, 165 ° 10 ′ 8 ″ E]; alt. 700 m; humid forest; 3 Mar. 1973; H. S. MacKee 26374; P [P 00124843] • Haute Diahot, Tendé, exploitation forestière Frouin; [20 ° 24 ′ 37 ″ S, 164 ° 31 ′ 19 ″ E]; alt. 600 m; humid forest, micaschists; 26 Apr. 1976; H. S. MacKee 31162; P [P 00124839] • Roche Ouaième; [20 ° 38 ′ 35 ″ S, 164 ° 51 ′ 36 ″ E]; alt. 850 m; maquis, schists; 22 Dec. 1977; H. S. MacKee 34465 (leg. Cherrier); P [P 00121154] • Monéo; [21 ° 8 ′ 21 ″ S, 165 ° 27 ′ 51 ″ E]; alt. 250 m; altered serpentine plateau, maquis; 25 Apr. 1979; H. S. MacKee 36818; P [P 00124877] • Pouébo: Mont Mandjélia; [20 ° 24 ′ 9 ″ S, 164 ° 31 ′ 28 ″ E]; alt. 700 m; humid forest, micaschists; 8 Feb. 1981; H. S. MacKee 38729 (leg. Bégaud); P [P 00124870] • Mandjélia, forested slopes; [20 ° 24 ′ S, 164 ° 32 ′ E]; alt. 500 m; 20 Dec. 1981; G. McPherson 4531; MO • Ponandou River Valley, forested slopes below Mont Inédète; 20 ° 49 ′ 10 ″ S, 165 ° 11 ′ 18 ″ E; alt. 550 m; 10 May 2002; G. McPherson 18723; MO • Cascade la Guen; 19 Nov. 2010; J. Munzinger 6358, P. Lowry, M. Callmander, H. Vandrot, T. & M. Teimpouene; MO • Bopope, base of the Kantalupaik (south buttress), summit of the Inédète range; 20 ° 51 ′ 7 ″ S, 165 ° 0 ′ 28 ″ E; alt. 320 m; 28 Dec. 2017; fl.; M. Pignal 516 5, J. Munzinger & D. Bruy; P [P 01073021] • Balade; [20 ° 18 ′ 56 ″ S, 164 ° 29 ′ 52 ″ E]; s. d.; E. Vieillard 1332; P [P 00124865] • Mont Görö Até; 21 ° 1 ′ 42 ″ S, 165 ° 10 ′ 12 ″ E; 19 Nov. 2002; F. Tronchet 484, J. Munzinger, D. Létocart, I. Létocart, J. - P. Butin, A. Oddi & A. Obry; P [P 00354837, P 00354120]. – Province Sud • Forest of ‘ Mois de Mai’; [22 ° 7 ′ 6 ″ S, 166 ° 38 ′ 48 ″ E]; 13 Jun. 1951; M. G. Baumann-Bodenheim 14050; P [P 00124861] • ibid.; 24 Jun. 1951; M. G. Baumann-Bodenheim 14179; P [P 00124860] • Mont “ Algaoné ” [Algaoué], serpentine; [22 ° 12 ′ 10 ″ S, 166 ° 31 ′ 40 ″ E]; alt. 500 m; 19 Dec. 1950; A. Guillaumin 7031 & M. G. Baumann-Bodenheim; P [P 00124859] • Mé Amméri; [21 ° 39 ′ 34 ″ S, 165 ° 50 ′ 36 ″ E]; alt., 700 m; 27 Nov. 1950; A. Guillaumin 8647 & M. G. Baumann-Bodenheim; P [P 00124852] • ibid.; 27 Nov. 1950; A. Guillaumin 8700 & M. G. Baumann-Bodenheim; P [P 00124851] • ibid.; 28 Nov. 1950; A. Guillaumin 8744 & M. G. Baumann-Bodenheim; P [P 00124854] • ibid.; 28 Nov. 1950; A. Guillaumin 8721; P [P 00124748] • ibid.; 28 Nov. 1950; A. Guillaumin 8780 & M. G. Baumann-Bodenheim; P [P 00124853] • ibid.; 28 Nov. 1950; A. Guillaumin 8882 & M. G. Baumann-Bodenheim; P [P 00124855] • ibid.; 29 Nov. 1950; A. Guillaumin 8938 & M. G. Baumann-Bodenheim; P [P 00124856] • ibid.; 29 Nov. 1950; A. Guillaumin 8969 & M. G. Baumann-Bodenheim; P [P 00124858] • ibid.; 30 Nov. 1950; A. Guillaumin 9030 & M. G. Baumann-Bodenheim; P [P 00124864] • Forest of Rivière Bleue; [22 ° 6 ′ 11 ″ S, 166 ° 38 ′ 0 ″ E]; 22 Feb. 1951; A. Guillaumin 10965 & M. G. Baumann-Bodenheim; P [P 00124857] • ibid.; A. Guillaumin 10966 a & M. G. Baumann-Bodenheim; P [P 00124863] • Mont Bario; [22 ° 10 ′ 54 ″ S, 166 ° 30 ′ 18 ″ E]; alt. 500 m; 20 Apr. 1951; A. Guillaumin & M. G. Baumann-Bodenheim 12523 a; P [P 00124862] • Farino: forest of Mépéou (Exploitation forestière Germain); [21 ° 37 ′ 5 ″ S, 165 ° 46 ′ 35 ″ E]; alt. 500 m; humid forest; 11 Feb. 1966; H. S. MacKee 14412; P [P 00124848, P 00124873] • Col d’Amieu: Mont Pembai; [21 ° 34 ′ 36 ″ S, 165 ° 49 ′ 38 ″ E]; alt. 500 – 600 m; humid forest; 10 Jun. 1973; H. S. MacKee 26765; P [P 00124842] • ibid.; H. S. MacKee 26766; P [P 00124841] • Port Boisé, associated to 30278; [22 ° 20 ′ 58 ″ S, 166 ° 56 ′ 18 ″ E]; 24 Jan. 1976; H. S. MacKee 30672 (leg. Aymard); P [P 00124840] • 4 km west of Mé Aoui; [21 ° 25 ′ 27 ″ S, 165 ° 32 ′ 6 ″ E]; alt. 600 m; humid forest, schists; 31 Oct. 1976; H. S. MacKee 32173 (leg. Bégaud); P [P 00124847] • Port Boisé; [22 ° 20 ′ 59 ″ S, 166 ° 56 ′ 19 ″ E]; 9 May 1978; H. S. MacKee 35091 (leg. Bégaud); P [P 00124878] • Paita: Tao; [20 ° 34 ′ 24 ″ S, 164 ° 47 ′ 57 ″ E]; 8 Apr. 1982; H. S. MacKee 40310 (leg. Bégaud); P [P 00121153] • Piste du Dzumac; [22 ° 4 ′ 46 ″ S, 166 ° 26 ′ 34 ″ E]; alt. 800 m; 16 Mar. 1985; H. S. MacKee 42497 (leg. Aymard); P [P 00124875] • Dzumac track; [22 ° 4 ′ 2 ″ S, 166 ° 26 ′ 39 ″ E]; alt. 900 m; humid forest, serpentine terrain; 20 Dec. 1985; H. S. MacKee 42955 (leg. Aymard); P [P 00124871] • Thy River valley, ca 12 air-km NE of Nouméa, rainforest near 400 m; [20 ° 10 ′ 55 ″ S, 166 ° 31 ′ 19 ″ E]; 8 Apr. 1979; G. McPherson 1530; P [P 00124876]; MO • Mt. Rembai: above Col d’Amieu, forested slopes; [21 ° 36 ′ S, 165 ° 51 ′ E]; alt. 650 – 850 m; 9 May 1984; G. McPherson 6542; P [P 00124876]; MO • Flanc du Mont Dore; [22 ° 17 ′ 36 ″ S, 166 ° 35 ′ 17 ″ E]; s. d.; Musée Néocalédonien 394; P [P 00124866].	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	description	Description Epiphyte (also lithophytic), erect with graminoid habit. Roots whitish, ca 1 – 2 mm wide, at the base of the plant (axillary roots lacking, but sometimes with adventive rooted plantlets, ‘ keikis’). Stems spindly, 20 – 70 cm long, cylindrical, covered by the sheaths of the oldest leaves, lamina remaining only from the upper middle to the upper third of the adult stem. Lamina narrow and long, 45 – 100 × 4 – 5 mm, apex attenuated, carrying a V-shaped depression under half of its length (Fig. 1 R). Internodes 25 – 30 mm long at the base of the stem. Sheaths deeply furrowed, beak opposite to the lamina, flute-shaped. Inflorescences always 2 - flowered. Ovary resupinate. Flower white, fragrant. Sepals long, narrow, attenuated, ca 35 × 2 mm. Petals long and narrow, equaling the sepals, 30 × 2 mm. Lip trilobate, lateral lobes rounded, median lobe ending as a point, the lip with orange deep within. Central carina proximal, without papillose hairs, edge slightly toothed. Dots yellow-orange on the mentum and the carina. Mentum 4 mm long. Column 3 mm long. Fruit fusiform, greenish yellow, ca 15 mm long and 8 mm in diameter. Dried seed with transparent testa about 191 × 54 μm, fusiform, with extremity and base truncate. Extremity strongly spiral. Hydrated seed ovate sacciform. Cells cubic or with extremities rounded, elongate, ca 57 – 100 × 7.3 – 8.5 μm, edges thick with spiral orientation, cellular walls smooth. Embryo spherical ca 10 – 11 μm in diameter (Fig. 3 A – B).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	distribution	Distribution and ecology The endemic plant is widespread in humid or gallery forests all over the main island ‘ Grande-Terre’, from 50 to 900 m, but has not been observed in sclerophyll forest (west coast), or in the extreme northwest (Fig. 6).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	discussion	Taxonomic notes Dendrobium camaridiorum produces numerous adventive plantlets (‘ keikis’), which is not the case of D. butinii sp. nov. The long, attenuated leaves with a V-shaped depression on the blade surface are the easiest characters to observe in D. camaridiorum. It is distinguished from D. butinii sp. nov. by the white, very elongated sepals (shorter and green in D. butinii sp. nov.). Leaf anatomy shows D. camaridiorum very similar to D. letocartiorum sp. nov. (see details under D. letocartiorum sp. nov. below).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	biology_ecology	Phenology Flowers are observed throughout the year. It seems that the hours of opening (in the morning) and closing of the flowers (in the afternoon) are synchronous throughout the territory.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	conservation	IUCN status Dendrobium camaridiorum is the most abundant species of the graminoid group in New Caledonia, and was evaluated as Least Concern (LC) by the New Caledonian Red List Authority.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF89FFA4FDCE540A6332F99B.taxon	discussion	Typification Vieillard’s numeration cannot be understood as true collection numbers (Morat 2010). Indeed, he often attributed the same number to different gatherings that he regarded as comprising a single species, however he confused many taxa, thereby generating some nomenclatural problems as many of his collections were chosen as types (see for example Pierre et al. 2014). Comparison of the material deposited at W with a specimen at P that clearly represents the same collection indicates that an error occurred in transcribing the number on the former, which is probably a fragment removed from the original specimen. Labels on the Paris specimen bear the number Vieillard 1332, whereas the sheet at W is numbered 1192, which in fact corresponds to material of Phyllanthus cornutus Baill. (Euphorbiaceae Juss.). The material in Vienna consists of a stem fragment, several leaves, a single, dissected, immature flower, and a drawing of the Paris material. The latter is a tracing of the Paris plant (Hallé, pers. comm.). This interpretation is consistent with Reichenbach’s visit to P in April 1864 (Paris Herbarium Visit Catalogue). Paris’s material comprises a bud and a tuft of 3 stems, and is clearly conspecific with the fragmentary collection at W. We can reasonably assume that Reichenbach studied both P and W material, which would thus represent syntypes. We have selected the material at W as the lectotype as it clearly served as the basis of the description of the flower.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	description	Figs 1 K – L, O, 5 E – F, 7	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	materials_examined	Type: NEW CALEDONIA – Province Nord • près “ Ou-Hinna ” [Oua Hinna]; alt. 900 m; 2 Jan. 1903; Schlechter 15603; holotype: B (destroyed); lectotype: P [P 00121168]!, here designated; isolectotype: K [K 001085479] photo seen, BM [BM 000505888] photo seen).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	etymology	Etymology The epithet refers to the texture of the leaf.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	materials_examined	Material examined NEW CALEDONIA – Province Nord • Haute vallée de la Tchamba; [21 ° 1 ′ 56 ″ S, 165 ° 13 ′ 36 ″ E]; alt. 100 – 200 m; gallery forest near the river; 28 Dec. 1965; fl.; H. S. MacKee 13751; P [P 00124990] • Haute Tchamba; [21 ° 3 ′ 23 ″ S, 165 ° 15 ′ 22 ″ E]; alt. 50 m; gallery forest; 13 Nov. 1969; fl.; H. S. MacKee 21172; P [P 00124992], P [P 00124993], P [P 00124994] • Plateau of the Dôme Tiébaghi; [20 ° 27 ′ 37 ″ S, 164 ° 12 ′ 7 ″ E]; alt. 500 m; 20 Jun. 1972; fl.; H. S. MacKee 21337; P [P 00124991] • Touho, Ponandou; [20 ° 49 ′ 12 ″ S, 165 ° 13 ′ 45 ″ E]; alt. 10 – 100 m; forest on serpentine substrate; 2 Jan. 1973; H. S. MacKee 26141; P [P 00124995] • Poindimié: Povila; [20 ° 57 ′ 0 ″ S, 165 ° 17 ′ 16 ″ E]; alt. 400 – 500 m; humid forest, schistose crest; 21 Mar. 1975; H. S. MacKee 29892; P [P 00124996] • Touho: Ponandou; [20 ° 49 ′ 11 ″ S, 165 ° 14 ′ 14 ″ E]; alt. 30 m; gallery forest, schists; 22 Mar. 1975; H. S. MacKee 29897; P [P 00124997] • Poindimié; [20 ° 56 ′ 27 ″ S, 165 ° 19 ′ 39 ″ E]; alt. 30 m; humid forest, schists; 14 Jun. 1976; fl., cult.; H. S. MacKee 31399 (leg. Aymard); P [P 00124998] • Haute Amoa: base du Mont Grandié; [20 ° 58 ′ 59 ″ S, 165 ° 9 ′ 15 ″ E] alt. 50 m; gallery forest, serpentine substrate; 25 Dec. 1976; fl.; H. S. MacKee 32136; P [P 00124999] • Poindimié: Ndiambi; [20 ° 57 ′ 57 ″ S, 165 ° 19 ′ 14 ″ E]; alt. 200 m; 23 Nov. 1987; H. S. MacKee 43781 (leg. Aymard); P [P 00123284], P [P 00354112 alc.] • Flowered in greenhouse in Nov. 1983; P. Morat 5321 (original data: Bopope, Feb. 1977, collected by P. Morat); P [P 00121169] • On the mountains at Ou-Hinna; [20 ° 30 ′ 22 ″ S, 164 ° 42 ′ 55 ″ E]; alt. 900 m; 2 Jan. 1903; fl.; R. Schlechter 15603; P [P 00121168]. – Province Sud • Haute Yaté, Rivière Bleue; [22 ° 6 ′ 46 ″ S, 166 ° 41 ′ 4 ″ E]; alt. 200 m; humid forest, serpentine substrate; 1 Feb. 1985; H. S. MacKee 42443 (leg. Bégaud); P [P 00125000] • On the mountains at Ngoye; [21 ° 49 ′ 8 ″ S, 166 ° 28 ′ 23 ″ E]; alt. 300 m; 13 Nov. 1902; fl.; R. Schlechter 15277; LY [LY 0562048].	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	description	Description Erect or downward arching epiphyte. Roots whitish, ca 1 – 2 mm wide, at the base of the plant (axillary roots lacking). Stems 20 – 100 cm long, robust. Sheaths of the oldest leaves not always covering the stem. Leaves dark green shiny above, lighter below, thick and coriaceous. Lamina shortly ovate to elliptic, 50 – 70 × 9 – 15 mm. Midrib visible, secondaries weakly visible. Lamina with a visible V-shaped depression printed around the lower third of the stem. Base abruptly narrowed, apex attenuate, emarginate, with two sub-equal lobes. Sheath striated in its entire length, with edge oblique, opposite to the lamina and applied to the stem. Inflorescence 2 - flowered. Ovary resupinate. Flower yellow. Sepals triangular, 10 × 2.9 mm. Petals elliptical, 10 × 2.5 mm. Lip trilobed ca 6 × 5 mm. Lateral lobes with papillose hairs, median lobe with distinctive carina, extending into short papillate hairs. Edge slightly fimbriate. Mentum ca 3 mm. Column about 1.7 mm long. Fruit fusiform ca 8 × 10 mm long and 8 mm in diameter. Seed not seen.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	distribution	Distribution and ecology This endemic species is found in a broad ecological range, quite commonly scattered in several places on the main island ‘ Grande-Terre’ (Fig. 7), an epiphyte in humid or gallery forest. It grows from near sea level (10 m) to 900 m.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	discussion	Taxonomic notes In New Caledonia, in the sect. Grastidium, D. crassifolium is the only species to have parts of the perianth rounded at the apex. Dendrobium crassifolium has the thickest leaves of the graminoid New Caledonian Dendrobium, it is also the only species having vascular bundles in two lines (vs one), more than 32 vascular bundles (vs <30), and the largest vascular bundle with diameter <½ the thickness of the leaf blade (vs> ¾ the thickness).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	biology_ecology	Phenology Flowering probably throughout the year (not observed in April).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF85FFA2FDDF56926330FA5C.taxon	conservation	IUCN status The species is common in New Caledonia and was evaluated as Least Concern (LC) by the New Caledonian Red List Authority.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	description	urn: lsid: ipni. org: names: 77209475 - 1 Figs 1 A, H, S, 3 C – D, 5 C – D, 8, 9	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	diagnosis	Diagnosis Dendrobium camaridiorum Rchb. f. affinis, sed planta gracilior foliis minoris fastigiatisque cum vagina minus sulcata, radicibus axillaribus, sepalis brevioris acuminatisque, petalis brevioris angustiorisque. Lobus medius labeli frimbriatus papillosusque.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	etymology	Etymology The species is dedicated to our good friend, Jean-Pierre Butin, an enthusiastic lover of botany, who first recognized and collected this taxon.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	materials_examined	Type material NEW CALEDONIA – Province Nord • s. loc.; 18 May 2001; fl.; J. - P. Butin s. n.; (original data: Mont Colnett 700 m, collected alive by J. P. Butin, 3 Oct. 1997); holotype: P [P 00157228]!; clonotype: P [P 00453885]! (see note). Paratypes NEW CALEDONIA – Province Nord • Cultivated in Koné; 7 May 2003; fl.; J. - P. Butin s. n.; (original data: Mont Colnett, collected by J. P. Butin); P [P 00453886] • Mont Colnett; 20 ° 29 ′ 17 ″ S, 164 ° 42 ′ 42 ″ E; alt. 690 m; 10 May 2003; fl. & fr.; J. - P. Butin s. n.; P [P 00777172, P 00777173] • Amoa GR Tchamba, Poindimié; 20 ° 59 ′ 2 ″ S, 165 ° 13 ′ 55 ″ E; 13 Nov. 2016; fl. & fr.; C. Laudereau 133; NOU [NOU 090367] • Colnett Oua Ina, Pouébo; 20 ° 30 ′ 35 ″ S, 164 ° 43 ′ 56 ″ E; 5 Jan. 2017; fr.; C. Laudereau 256; NOU [NOU 090368] • Colnett Oua Ina, Pouébo; 20 ° 30 ′ 38 ″ S, 164 ° 44 ′ 0 ″ E; 2 Jan. 2018; C. Laudereau 663; NOU [NOU 090369] • Poindimié, Povila, Nérupaawé Pic Amoa; 20 ° 57 ′ 25 ″ S, 165 ° 17 ′ 27 ″ E; 21 Oct. 2018; fl.; C. Laudereau 1061 & D. Szlachetko; NOU [NOU 090370] • Ouane Batch, Pouébo; 20 ° 30 ′ 35 ″ S, 164 ° 43 ′ 56 ″ E; 23 Oct. 2018; fr.; C. Laudereau 1115 & D. Szlachetko; NOU [NOU 090371] • Mont Colnett, east side; 20 ° 29 ′ 13 ″ S, 164 ° 42 ′ 39 ″ E; alt. 700 m; 3 Nov. 2003; fl. & fr.; A. Mouly 101; P [P 00777175] • Tchamba valley; 21 ° 0 ′ 13 ″ S, 165 ° 14 ′ 49 ″ E; fr.; 23 Apr. 2004; M. Pignal 2350, J. Munzinger, J. P. Butin, C. Létocart, I. Létocart & D. Létocart; P [P 02288380] • Tchamba valley; 21 ° 0 ′ 34 ″ S, 165 ° 14 ′ 24 ″ E; fr.; 24 Apr. 2004; M. Pignal 2384, J. Munzinger, J. - P. Butin, C. Létocart, I. Létocart & D. Létocart; P [P 00777174].	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	description	Description Terrestrial or epiphytic herb with graminoid habit. Thin roots at the base of the plant, as well as along the stem, at the base of the nodes. Stems spindly 400 × 1.5 – 2 mm. Internodes 1 – 1.5 cm long. Sheaths of the dried leaves covering all of the stem, not deeply furrowed, the part opposite to the stem showing a beak-like extension. Leaves with narrow lamina, ca 2 mm wide at the base and 35 – 40 mm long. Lamina with a visible V-shaped depression printed around the lower third of the stem. Inflorescence 2 - flowered, emerging from a small sessile sheath. Ovary resupinate. Flowers: sepals triangular, greenish, 9 × 3 mm, abruptly acuminate, acumen of the sepal 4 mm long. Petals linear, very narrow, greenish, ca 7 × 0.5 mm. Lip yellow-green, trilobate, with small short papillate hairs on edges. Lateral lobes 1 mm wide, weakly carinate, each carina surmounted by the same small papillate hairs. Median lobe cordiform, 3 mm wide, ending in a central clearly distinguishable carina, laterally fimbriate, each fibre covered with small papillate hairs, ending by a tuft of thick long hairs. Internal face of the column with longitudinal reddish macules, 3 mm height, mentum showing a right angle with the ovary, 3 mm. Ovary ca 2 mm long, on a peduncle 12 mm long. Fruit ellipsoid, ca 18 × 4 mm. Dried seed with transparent testa, 208 × 53 μm, fusiform with extremity and base attenuated. Extremity strongly spiralled. Hydrated seed elliptic sacciform. Cells cubic to polygonal, ca 65 × 4.6 – 6.6 μm, with spiral orientation. Edges thick, with spiral orientation, cellular walls smooth. Embryo spherical or elongate, about 8 μm in diameter.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	distribution	Distribution and ecology This endemic species has been located so far on one mountain (Mont Colnett) and in one valley (Tchamba) and appears restricted to humid forest of the North-East of the main island. Dendrobium butinii sp. nov. appears to occur in areas with the same ecological conditions as those of D. unicarinatum. It can also occur in windy areas, as a lithophytic cushion plant on mossy micashists, in a dense population of cushion-like plants (Butin, pers. comm.). The species is known from 280 to 700 m elevation. The species has been observed also in the forest of Sailles (Thio) and Pénari (C. Laudereau, pers. comm.).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	discussion	Taxonomic notes The material studied that we attribute to D. butinii sp. nov. clearly does not correspond to D. minutiflorum Kraenzl. (Kränzlin 1914: 84), which was considered an insufficiently known species by Hallé (1977) and was based on a single collection (Sarasin 579) that was probably destroyed in Berlin. According to the original description (Kränzlin 1914), D. minutiflorum has bilobed leaves that are 23 mm long and 6 – 7 mm wide, 2 – 3 - flowered inflorescences, suggesting that this taxon would be closest to D. isochiloides Kraenzl. (Kränzlin 1894: 334) (= Monanthos isochiloides (Kraenzl.) Rauschert in Rauschert 1983: 455) and D. erectifolium J. J. Sm. (Smith 1908: 16) (= Monanthos erectifolius (J. J. Sm.) Rauschert in Rauschert 1983: 455). Hallé suggested this species might be related to members of sect. Grastidium, although the 3 - flowered inflorescence would be very surprising inside this section. The ecological conditions in which the two taxa (D. minutiflorum and D. butinii sp. nov.) occur are also different: D. minutiflorum was collected at Yaté in extreme SE New Caledonia, at low altitude (100 m) in an area with ultramafic soil, whereas D. butinii sp. nov. grows between 450 and 700 m at sites with sedimentary substrates. Dendrobium butinii sp. nov. matches the characters of the “ fourth group ” so called by Hallé (1977), characterized by having leaves along the stem, internodes hidden by leaf sheaths that are not imbricate and 2 - flowered inflorescences on the leafy stems, opposite the lamina and developing from a small, sessile sheath. In New Caledonia this morphological group is represented by three species: D. butinii sp. nov., D. crassifolium and D. camaridiorum. This group is also remarkable by the presence of a ‘ V-like’ central imprint on the leaves, always clearly present in D. camaridiorum and D. crassifolium, sometimes less apparent in D. butinii sp. nov. (Figs 1 R, 8). Dendrobium camaridiorum is the closest species to D. butinii sp. nov. Based on habit, D. butinii sp. nov. can be distinguished by its more spindly aspect, its smaller leaves, the presence of numerous adventive roots without adventive plantlets (‘ keikis’) and its abruptly narrowed sepals. Floral features, including the presence of papillose hairs on the lip and its fimbriate aspect, suggest a close affinity between D. butinii sp. nov. and D. crassifolium, although the hairs and fibres are much more developed in the latter species. Dendrobium butinii sp. nov. has thin leaves and vascular bundles in one line as D. camaridiorum, but differ by having vascular bundles <15 (vs> 22), midrib not prominent (vs prominent), largest bundles in position 3 (4 – 5) (vs 5 (– 6 )) and presence of supernumerary fibre bundles (vs absence). Dendrobium butinii sp. nov., D. camaridiorum and D. crassifolium were all observed by the authors growing together on a single tree trunk in the Tchamba valley in NE New Caledonia.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	biology_ecology	Phenology Flowering and fructification periods need further observations. The fruits were observed from the field and in cultivation (in New Caledonia) in January, April to May, October to November. Flowering specimens were observed in January, April, May and October to November.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	conservation	IUCN status Even if uncommon, D. butinii sp. nov. was evaluated as Least Concern (LC) by the New Caledonian Red List Authority, because no specific threat to the species or its habitat is known.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF83FFBEFE6B55DF65EBFB0E.taxon	discussion	Note Unrecognised by the International Code of Nomenclature for algae, fungi, and plants (Turland et al. 2018), the clonotype notion is used by numerous systematicians working on groups which can be cultivated. By ‘ clonotype’ we designate here all material originated from the individual which provided the holotype and isotypes. Thus, the collector of a clonotype and the collection date can be different from those of the ‘ type’ material. According to the Code, this is a paratype, but it can be genetically equated to an isotype; thus we believe the clonotype notion should be accepted by the Code.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	description	urn: lsid: ipni. org: names: 77209476 - 1 Figs 1 C – D, F – G, T, 3 E – G, 4 Ba, 5 G, 10, 11	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	diagnosis	Diagnosis Dendrobium bilobo Lindl. affinis, sed foliorum rostratis vaginis (versus truncatas), sine atropurpureis maculis labello, dorsali sepalo triangulari, 12 × 2 mm (versus ovatum 4 – 5 × 2 – 3 mm), lateralibus sepalis 12 × 4 mm (versus 6. 5 × 4. 5 mm), petalis linearis vel paulo lanceolata, 11 × ca 1 mm (vs lanceolata, 3. 5 – 4 × 1. 5 – 2 mm), gynostegio cum atropurpureis faciali interni maculis (vs pallide purpureis aut albis), praecipue differt.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	etymology	Etymology The species is dedicated to our friends Irène and Daniel Létocart who collected and cultivated this plant in 1978 – 1980, providing H. S. MacKee with material for the first herbarium specimens, and also to the Létocart family, whose many members are active naturalists, creators of the Endemia website, and with whom we have made many field trips.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	materials_examined	Type material NEW CALEDONIA – Province Nord • Mont Colnett, versant Est; 20 ° 29 ′ 13 ″ S, 164 ° 42 ′ 39 ″ E; alt. 700 m; border zone between the altitude rainforest and the savanna of burns, schists; 3 Nov. 2003; fl. & fr.; Mouly 99; holotype: P [P 00777176]!; isotypes: P [P 00777177]!, NOU [NOU 090448!]. – Dendrobium crassifomentum Hallé ined. in herb.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	description	Description Erect epiphyte. Roots whitish, ca 1 – 2 mm wide, at the base of the plant (axillary roots lacking). Stems reaching 60 cm long, slightly flattened, completely covered by the sheaths of the old leaves, lamina remaining only in the upper half, yellow-orange on dry material. Internodes ca 25 mm long at the base of the stem. Leaves spirally arranged, dark shiny green above, light green below (fide collectors’ notes), ca 75 × 7 mm. Midrib impressed on adaxial surface, very prominent on abaxial surface. Two lateral nerves very conspicuous, <1 – 2 mm from the margin (see discussion of anatomy below), numerous prominent smaller nerves visible, all convergent at the apex. Base narrow, forming a flattened pseudopetiole. Extremity emarginate, asymmetrical, the two lobes often diverging. Sheath striated in its upper half and ending in a beak opposite to the lamina and applied on the stem. Inflorescence 1 - flowered, emerging through a slit of the foliar sheath. Pedicel 3.5 mm long. Ovary ca 3 mm long, non-resupinate. Bract acuminate, 2 – 3 mm long. Flower pale green to yellow, ca 12 mm long. Dorsal sepal triangular, 12 × 2 mm. Lateral sepals triangular, 12 × 4 mm at the base, with 7 nerves. Petals linear or slightly lanceolate, 11 × ca 1 mm. Lip entire, red, approximately elliptic, margin thin and undulate, 10 mm long and 3 mm wide, obscurely tricarinated. Mentum, 3 mm long. Column, 2.5 mm high and 2 mm wide with a fimbriate margin. Fruits very few despite an abundant flowering, yellow-greenish to brown when mature, ovoid, 8 mm in diameter, with base slightly narrower. Bracts persistent. Dried seed with transparent testa, ca 267 × 86 μm, fusiform, with extremity slender and base truncate, extremity strongly spiraled. Hydrated seed ovate, sacciform. Cells cubic or with extremities rounded, elongate, ca 43 – 110 × 7.3 – 10.2 μm, with thick edges, spiral orientation and smooth cellular walls. Embryo spherical elongate, ca 6 – 7 μm wide, inserted in the lower ¾ of the testa.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	discussion	Taxonomic notes Dendrobium letocartiorum sp. nov. has always slightly flattened stems. The species has affinities with D. bilobum Lindl., but the flower is bigger and the lip does not have a dark red spot on the adaxial surface. Leaf anatomy shows that D. letocartiorum sp. nov. is very similar to D. camaridiorum, having thin leaves, 24 – 28 vascular bundles in one line and largest bundle in position 5 (– 6). They only differ by the margins in transverse section, which are obtuse in D. letocartiorum sp. nov. and truncate in D. camaridiorum (Fig. 4 B).	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	biology_ecology	Phenology Flowering and fructification periods need further observations. The fruits were observed in the field and in cultivation (in New Caledonia) during the months of January, May, July, October, November and December and flowering specimens are from May and November.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	distribution	Distribution and ecology This endemic species occurs on the main island, in the central chain and on the Panié range in North-East coast. It grows on edges of humid forest, and also on rocks as a lithophyte and is known from 700 – 800 m a. s. l. The species has been observed also in Plateau de Dogny (Sarraméa) (C. Laudereau, pers. comm.)	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
03A887CAFF9FFFBAFE3C550D646DFB50.taxon	conservation	IUCN status This species is currently known from only four locations in New Caledonia, based on herbarium specimens. Dendrobium letocartiorum sp. nov. was evaluated as Near Threatened (NT) by the New Caledonian Red List Authority, considering the species apparent rarity and the low threat to its habitat.	en	Pignal, Marc, Munzinger, Jérôme (2020): Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species. European Journal of Taxonomy 633: 1-26, DOI: 10.5852/ejt.2020.633
