Lasianthus obliquinervis subsp. novoguineensis, H. Zhu

Zhu, H., Roos, M. C. & Ridsdale, C. E., 2012, A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae), Blumea 57 (1), pp. 1-102 : 68

publication ID

https://doi.org/10.3767/000651912X652012

DOI

https://doi.org/10.5281/zenodo.16855140

persistent identifier

https://treatment.plazi.org/id/1664BC60-3C0E-0D44-FFEB-4BEFFF1178F5

treatment provided by

Felipe

scientific name

Lasianthus obliquinervis subsp. novoguineensis
status

 

b. subsp. novoguineensis H.Zhu View in CoL , s ubsp. nov. — Fig. 27 View Fig

A typo foliis basi asymmetrice cuneatis,stipulis lineari-subulatis 6 mm longis differt. — Typus: J. Vandenberg et al. NGF.39936 (holo L), New Guinea, Western Highlands District, 4450 ft alt., in Castanopsis forest, 30 Oct. 1968 .

Shrub, branchlets terete, densely puberulous. Leaves: blades lanceolate to elliptic-lanceolate, 10–15 by 2.5 –5 cm, subcoriaceous, glabrous above, puberulous beneath, apex acuminate, base cuneate and asymmetric, nerves flat above, prominent beneath, 6 –7 pairs, pubescent, nervules conspicuous beneath, parallel. Stipules linear-subulate, 6 mm long, pubescent. Flowers fascicular, sessile; calyx campanulate, densely pubescent, limb with 4–5 triangular lobes; corolla 6–8 mm long, densely hirsute except the base. Drupes globose, hirsute, 4–5 mm diam, crowned by persistent calyx lobes, with 6 obtuse ridges; pyrenes 6, smooth on the abaxial face, ovate in transverse section.

Distribution — Endemic to Papua New Guinea (Western Highlands).

Habitat & Ecology — In montane forest between 1400–1500 m altitude. Flowering and fruiting between July and October.

Additional specimen examined. New Guinea, Western Highlands, Streimann 8460 (L).

Note — This subspecies differs from the typical subspecies by having leaves with cuneate and asymmetric bases, stipules linear-subulate (6 mm long). The typical subspecies has leaves with acute and symmetrical bases, stipules triangular to oblong-triangular.

J

University of the Witwatersrand

L

Nationaal Herbarium Nederland, Leiden University branch

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