Lasianthus perakensis var. kalimantanensis, 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 : 73

b. var. kalimantanensis H.Zhu , var. nov.

A typo foliis minoribus, nervis 3–5, ramis sparsim puberscentibus, costis et nervis sparsim puberscentibus subter, pedicellis 1 mm longis, drupis minoribus differt. —

Typus: Church et al. 713 ( holo K), Borneo , C Kalimantan, Sintang , 100 m alt .

Branches sparse puberulous. Leaves: blades elliptic or obovate-elliptic, 13–16 by 3–4.5 cm, subcoriaceous, glabrous above, sparse puberulous on midrib and nerves beneath, apex cuspidate or caudate, base broadly cuneate; nerves 3 – 5 pairs, flat above, prominent beneath, nervules subparallel, conspicuous on both sides. Stipules triangular, acute, up to 4–5 mm long, puberulous. Cymes sessile, bracts absent. Flowers with 1 mm long pedicels, crowned; calyx campanulate, calyx mouth wide, truncate, with 5 indistinct teeth, pubescent. Drupes hemispheric, c. 2 mm diam, subglabrous or sparsely puberulous, 10-ribbed, crowned by the calyx limb; pyrenes 10.

Habitat — Mixed dipterocarp forest.

Distribution — Borneo, C Kalimantan.

Note — The variety differs from the typical variety by having smaller leaves with nerves 3–5 pairs, 13–16 by 3–4.5 cm; sparse puberulous on branches, midrib and nerves beneath; smaller drupes c. 2 mm diam, with 1 mm long pedicels.