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Didymoglossum mindorense (Christ) K. Iwats.

Chokrassameehirun, Siwakorn, Kraichak, Ekaphan & Jaruwattanaphan, Tassanai, 2025, A new species, Didymoglossum radiatum (Hymenophyllaceae), and two new records with note to the genus Didymoglossum Desv. from Thailand, PhytoKeys 261, pp. 59-75 : 59-75

publication ID

 https://doi.org/10.3897/phytokeys.261.157609

DOI

 https://doi.org/10.5281/zenodo.16754100

persistent identifier

https://treatment.plazi.org/id/49912CD1-587F-5AD0-BD5C-D2FDF6DC1A86

treatment provided by

PhytoKeys by Pensoft

scientific name

 Didymoglossum mindorense (Christ) K. Iwats.
status

 

Didymoglossum mindorense (Christ) K. Iwats. View in CoL in Ebihara et al., Blumea 51: 236, 2006.

Figs 5 View Figure 5 , 6 M – O View Figure 6

Type.

Philippines • Mindoro , E. D. Merrill 6066 (isolectotype, designated by Croxall, Austral. J. Bot. 23 (2): 538 (1975), GH [ GH 00022253 , photo seen], MICH [ MICH 1191083 , photo seen], P [ P 00624463 , photo seen], US [ US 00134614 , photo seen]) .

Diagnosis.

Didymoglossum mindorense resembles D. bimarginatum (Fig. 6 P – R View Figure 6 ) but differs in having deeply lobed segments and fewer false veinlets, which are more widely spaced.

Description.

Rhizomes: filiform, long-creeping, densely covered with dark brown hairs. Stipes: short, to 5 mm long. Fronds: less than 3 cm long, usually 2–2.5 cm long, c. 1.2 cm broad, entire to pinnately lobed, round at apex, attenuate to broadly cuneate at base. Costa: glabrous, obsolete near apex. Submarginal false veinlets: continuous with 1–2 rows of normal cells outside. False veinlets: long, distantly placed, connecting and running from main veins to submarginal ones, distancely placed, usually 6–10 cells between adjacent false veins. Lobes: obtuse at apex, usually 0.5–0.7 (– 1) cm long, slightly undulate. Sori: solitary, sunk in lobes. Involucres: tubular, with a distinctly dilated mouth. Receptacles: long exserted, broken when aged.

Distribution and habitat.

Thailand, Malesia (Borneo, Philippines, New Guinea), Solomon Islands, Australia (NE Queensland). Epiphyte or epilithic near streams at lower elevations, usually growing at the base of the tree.

Additional specimens examined.

Thailand • Yala: Ban Chulapjon Phatthanna 7, 13 Jun. 2004, S. Saengrit 019 ( BKF); • ibid., 15 Jul. 2004, S. Saengrit 020 ( BKF) ; Narathiwat: Ta Mo , 10 Jun. 2004, S. Saengrit 016 ( BKF) ; Hala – Bala Wildlife Sanctuary , 22 Jul. 2004, S. Saengrit 028 ( BKF); • ibid., 9 Jun. 2004, S. Saengrit 009 ( BKF); • ibid., 23 Mar. 2024, S. Chokrassameehirun 24-228 ( BKF); • ibid., 24 Mar. 2024, S. Chokrassameehirun 24-236 ( BKF) ; ibid., 25 Mar. 2024, S. Chokrassameehirun 24-256 ( BKF) .

Specimens