Hydnophytum valetonii Jebb & C.R.Huxley, 2019
publication ID |
https://doi.org/10.3767/blumea.2019.64.01.02 |
DOI |
https://doi.org/10.5281/zenodo.16882402 |
persistent identifier |
https://treatment.plazi.org/id/03FBBD64-FFF4-813F-FFD0-5E897F78FEA7 |
treatment provided by |
Felipe |
scientific name |
Hydnophytum valetonii Jebb & C.R.Huxley |
status |
sp. nov. |
26. Hydnophytum valetonii Jebb & C.R.Huxley View in CoL , sp. nov. — Fig. 29 View Fig ; Map 4 View Map 4
Tuber parvum . Caules complures. Caulibus biniati (raro usque quaterni) tenues surculi laterales ad nodum quemque enati; caules primarii ad 3 mm crassi, quadrangulares, internodia 0.5 ad 2 cm; surculi laterales ad 1 mm crassi, quadrangulares,internodia 0.1 ad 0.8 cm, nodi prominentes tumores ad 1.5 mm latas formantes; surculi laterales longitudine crescente bifurcati. Folia fasciculata ut videtur in surculis lateralibus, recurva. Lamina in surculo primario cordata usque ovata, subtendens surculum lateralem, 1.1 per 0.3 ad 1.6 per 0.5 cm; lamina in surculis lateralibus elliptica usque orbicularis, 0.3 per 0.15 ad 0.9 per 0.2 cm. Inflorescentiae solum in surculis lateralibus gestae,sessiles,binatae.Flores ad 3 mm,lobi 1 mm.Pyrenae obovoidea,ad 3.5 per 2.5 mm.
— Typus: Pulle 513 (holo L L0000509 ; iso BO, L L0000507 , L0000508 ), New Guinea, Papua Province, Mt Perameles , 1 Dec. 1912 .
Etymology. Named in honour of Theodore Valeton (1855–1929) author of numerous Hydnophytum names.
Tuber small, 10 cm, spherical, irregular. Entrance holes conical, 0.5–1 cm across. Stems ascending to pendulous, several to 50 cm long, with paired, rarely up to 4, slender side shoots at each node; main stems to 3 mm thick, quadrangular, internodes 0.5–2 cm, side shoots to 1 mm thick, quadrangular, internodes 0.1–0.8 cm, nodes prominent swellings to 1.5 mm across, side shoots bifurcating with length. Leaves appearing to be clustered on side shoots, recurved. Lamina cordate to ovate on main shoot, subtending side shoot, 1.1 by 0.3 to 1.6 by 0.5 cm; elliptical to orbicular on side shoots 0.3 by 0.15 to 0.9 by 0.2 cm; dark glossy green above, pale below, stiff. Petiole short to absent, to 0.1 cm; stipules rounded with an apical apiculum, to 0.08 cm, caducous. Inflorescences confined to side shoots, sessile, paired. Flowers [2]?heterostylous. Calyx 1 mm, minutely 4-dentate. Corolla tube 1.5–2 mm, lobes 1 mm, with a short uncus at tip, and a narrow ring of hairs in tube. Anthers 0.7 mm, at mouth of tube, sessile or on 1 mm filaments. Pollen 3-porate, 44 (35–50) µm, brochi 1–1.5 µm. Stigma, bifid, immediately below anthers. Fruit glossy red, to 12 by 9 mm, calyx remains prominent. Pyrenes obovoid, to 3.5 by 2.5 mm; apex and base rounded.
Ecology & Habitat — Mossy forest,once on nutrient-poor soil, 900–1 070 m. Tuber not inhabited by ants, recorded with spiders.
Distribution — Indonesia (Papua Province).
Conservation status — Endangered (EN) under criteria B1ab(iii)+2ab(iii). The four known localities indicate 4 subpopulations within 400 km of one another. Other information: AOO 6 200 km 2 (using an auto-value cell width of 40 km), EOO 4 900 km 2.
Additional specimens examined. Kloss s.n. (BM, K), Utakwa expedition to Mt Carstenz; Jebb 121 ( LAE ), S4°30' E139°15' near Holuwon, 60 km SE of Wamena; Versteeg 1644 (BO), Mimika, Resi Mts.
Note — The apparent dimorphy of leaves, and the quadrangular main stem with long internodes and short, muchcontracted side shoots are characteristic of this species. It appears to represent a southern entity to the H. ramispinum complex which is restricted to the northern slopes of the Papua Province highlands. Valeton had planned to make Pulle 513 the type for his manuscript name ‘minutifolium’, we have preferred not to adopt this somewhat confusing name because of the number of small-leaved species in the West Papua highlands, and instead have named the species in honour of Theodore Valeton (1855–1929) for his taxonomic work on the ant-plants, unfortunately curtailed by his premature death. Leaf outlines of this species and H. ramispinum [25] are mapped.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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