Lasianthus longifolius subsp. laevis var. obtusifolius, 2012

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 : 58

c. var. obtusifolius H.Zhu , var. nov.

A typo foliis late-oblongis apice rotundatis basi subrotundatis differt. —

Typus: Wong 1569 ( holo L), Brunei, Belait, in primary forest, 7 Oct. 1989 .

Treelets, branchlets robust, often compressed, glabrous. Leaves broadly oblong, 22– 28 by 11.5 –13.5 cm rounded at apex and subrounded at base, coriaceous, glabrous and nitid, with the secondary nerves from the costa between nerves, nerves 7–10 pairs, nervules prominent beneath.

Distribution — Endemic to Brunei.

Habitat & Ecology — In primary forest. Flowering and fruiting in October.

Note —This variety differs from the typical variety by having broadly oblong leaves with rounded apex and subrounded base, 22– 28 by 11.5–13.5 cm.