Published May 29, 2012 | Version v1
Taxonomic treatment Open

Lasianthus wightianus Hook. f.

  • 1. Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Kunming 650223, P. R. China; corresponding author e-mail: zhuh @ xtbg. ac. cn.
  • 2. Netherlands Centre for Biodiversity Naturalis (section NHN), Leiden Uni- versity, P. O. Box 9514, 2300 RA Leiden, The Netherlands.

Description

131. Lasianthus wightianus Hook.f.

Lasianthus wightianus Hook.f. (1880) 188; King & Gamble (1904) 125; Ridl. (1923a) 162. — Type: Kew Dist. 2922 (Griffith s.n.) (holo K), Peninsular Malaysia, Mt Ophir.

Lasianthus venosus auct. non Blume: Wight (1846) 514.

Shrubs, up to 2.5 m high; branchlets robust, subterete, 2.5– 3 mm diam, brown-tomentose. Leaves: blades oblong or lanceolate oblong, 4–10 by 1.5–3.5 cm, rigid-chartaceous, scaberulous or tomentose hairs on midrib and nerves both surfaces, densely beneath,apex acuminate, base acute to subrounded, midrib and nerves slender and flat above, stout and prominent beneath, nerves 9–13 pairs, ascending at an angle of over 50°, curved to the margin, nervules prominent on both surfaces, conspicuously reticulate; petioles c. 2 mm long, tomentose. Stipules conspicuous, broadly triangular, 3–4 mm long, pubescent. Cymes sessile; bracts absent. Flowers sessile; calyx campanulate, pubescent, tube 0.8–1 mm long, lobes 5, subulate-triangular, c. 1 mm long; corolla hirsute outside. Drupes ellipsoid, glabrous or pubescent, c. 3 mm diam; pyrenes 4–5.

Distribution — Endemic to Peninsular Malaysia.

Note — This species is closely related to L. malaccensis by its leaves with conspicuously reticulate nervules, but differs from the latter by having densely pubescent branchlets, pubescent midrib and nerves on both surface; nerves 9 –13 pairs; petioles 2 mm long; stipules relatively big; drupes with 5– 6 pyrenes. Lasianthus malaccensis has young branchlets puberulous and later glabrescent, midrib and nerves minutely appressed puberulous beneath; nerves 8 – 9 pairs; petioles 5 – 6 mm long; stipules relatively small; drupes with 4 pyrenes.

Notes

Published as part of Zhu, H., Roos, M. C. & Ridsdale, C. E., 2012, A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae), pp. 1-102 in Blumea 57 (1) on page 94, DOI: 10.3767/000651912X652012, http://zenodo.org/record/16854795

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Linked records

Additional details

Biodiversity

Collection code
K
Scientific name authorship
Hook. f.
Kingdom
Plantae
Phylum
Tracheophyta
Order
Gentianales
Family
Rubiaceae
Genus
Lasianthus
Species
wightianus
Taxon rank
species

References

  • King G, Gamble JS. 1904. Materials for a flora of the Malayan Peninsula - Lasianthus Jack. Journal of the Asiatic Society of Bengal 73: 106-133.
  • Wight R. 1846. Notes on Indian Botany. Calcutta Journal of Natural History 6: 494-518.