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FOC | Family List | FOC Vol. 10 | Fabaceae | Hylodesmum

4. Hylodesmum laxum (Candolle) H. Ohashi & R. R. Mill, Edinburgh J. Bot. 57: 178. 2000.

疏花长柄山蚂蝗 shu hua chang bing shan ma huang

Herbs, erect, 30-100 cm tall. Stem woody at base. Leaves 3-foliolate, clustered at apex or scattered along stem; petiole 3-9 cm, pubescent; terminal leaflet blade broadly ovate, ovate, or lanceolate, 5-12 × 1.1-5.5 cm, both surfaces subglabrous or abaxially slightly pubescent, base orbicular, margin entire, apex acuminate. Racemes terminal or terminal and axillary, often branched, to 30 cm, laxly flowered, 2- or 3-flowered at each node. Pedicel 3-4 mm, elongated to 4-10 mm at fruiting. Calyx ca. 2 mm; lobes shorter than tube. Corolla pink, 4-6 mm; stan­dard elliptic, clawed; wings narrowly elliptic, auriculate and shortly clawed at base; keel obtuse, clawed, not auriculate. Leg­ume often 2-4-jointed; articles slightly broadly subobovate, (6-)9-10 × ca. 4 mm or smaller, hooked pubescent; stipe 4-10 mm; fruiting pedicel 4-10 mm. Fl. and fr. Aug-Oct.

Broad-leaved forests on mountain slopes, grassy riversides, streamsides in forests; 700-1400 m. Fujian, Guangdong, Guangxi, Gui­zhou, Hainan, Hubei, Hunan, ?Jiangxi, Taiwan, Xizang, Yunnan [Bhu­tan, India, Indonesia, Japan, Laos, Nepal, Philippines, Sri Lanka, Thai­land, Vietnam].

1 Leaves evergreen, adaxially lustrous, usually sparse on stem or approximate on lower parts of stem.   4a subsp. laxum
+ Leaves probably deciduous, adaxially not lustrous, approximate at apex or upper part of stem   (2)
2 (1) Leaves approximate at apex of stem; terminal leaflet broadly elliptic or broadly ovate, 4-5 × 2.7-3.2 cm.   4b subsp. falfolium
+ Leaves approximate on upper part of stem; terminal leaflet narrowly elliptic, ca. 4.5 × 1.5 cm.   4c subsp. lateraxum

Lower Taxa


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