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FOC | Family List | FOC Vol. 19 | Rubiaceae | Lasianthus

26. Lasianthus rhinocerotis Blume, Bijdr. 996. 1826.

黄毛粗叶木 huang mao cu ye mu

Shrubs, 1-3 m tall; branches and branchlets densely villous. Petiole 5-10 mm, densely brown villous; leaf blade leathery, oblong-lanceolate or lanceolate, 15-21 × 4-7 cm, glabrous adaxially, densely villous abaxially, base broadly cuneate to truncate, subrounded, rounded, or slightly cordate, apex caudate-acuminate; lateral veins 7-12 pairs; nervules parallel to subreticulate; veins and nervules elevated conspicuously abaxially; stipules generally persistent, triangular, 2.5-4 mm. Inflorescences congested-cymose to subcapitate, shortly pedunculate, densely villous to strigose or pilose; peduncles 3-10[-25] mm; bracts numerous, narrowly triangular, linear, or filiform, 6-12 mm, densely brown villous. Flowers sessile. Calyx densely strigose to pilose; hypanthium portion 1.5-2 mm; limb ca. 4 mm, usually 6-lobed; lobes linear-lanceolate, 1.5-3 mm. Corolla ca. 7 mm, densely strigose to pilose outside; tube ca. 4 mm; lobes 5, oblong, ca. 3 mm. Fruit subglobose or obovoid, ca. 4 mm in diam., strigillose or subglabrous, slightly longitudinally angled, crowned with calyx lobes; pyrenes 4 or 5. Fl. Apr, May.

Forests, shaded and wet places; 300-1600 m. Guangxi, Hainan, Yunnan [Indonesia (Java, Sumatra), Malaysia, Thailand, N Vietnam].

Lasianthus rhinocerotis subsp. rhinocerotis occurs in Indonesia (Java, Sumatra), Malaysia, and Thailand. The description is as follows: young branches and leaf abaxially densely hairy; leaf blade leathery, base rounded or slightly cordate, lateral veins 9-12 pairs, nervules densely anastomosing, parallel, stipules triangular, ca. 3 mm; bracts slender, filiform.

1 Leaf bases broadly cuneate to truncate or subrounded; stipules ± inconspicuous; bracts relatively thick, linear to narrowly triangular; young branches and leaf abaxially densely hairy; leaf blade papery to leathery with 8-12 pairs of lateral veins and with densely anastomosing, parallel nervules.   26a subsp. pedunculatus
+ Leaf bases rounded or slightly cordate; stipules triangular, ca. 3 mm; bracts slender, filiform; young branches and leaf abaxially sparsely hairy; leaf blade papery with 7 or 8 pairs of lateral veins and with loosely anastomosing, subreticulate nervules.   26b subsp. xishuangbannaensis

Lower Taxa


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