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FOC | Family List | FOC Vol. 10 | Fabaceae

102. Dumasia Candolle, Ann. Sci. Nat. (Paris). 4: 96. 1825.

山黑豆属 shan hei dou shu

Authors: Ren Sa & Michael G. Gilbert

Herbs or climbing subshrubs, twining. Leaves pinnately 3-foliolate; stipules and stipels persistent. Inflorescence axillary, race­mose; flowers medium-sized. Bracts and bracteoles small. Calyx tubular, mouth obliquely truncate, lobes inconspicuous or absent. Corolla yellow or light yellow, longer than calyx; petals all long clawed; standard usually obovate, rarely oblong or broadly elliptic, glabrous, with auricles; wings falcate-oblong, oblong, oblong-elliptic, or elliptic; keels usually slightly shorter than wings. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary shortly stipitate, linear; ovules 4 to many; style filiform, dilated and hol­low near middle, apical part cylindric, not barbate; stigma terminal, capitate. Legume linear, dehiscent, compressed, constricted be­tween seeds, not septate, with persistent, membranous, cylindric calyx at base. Seeds usually black or blue, subglobose; hilum short, central; aril not developed.

About ten species: S Africa, Asia; nine species (five endemic) in China.

1 Leaflets almost cordate or reniform, base truncate to shallowly cordate; stem very slender.   1 D. cordifolia
+ Leaflets ovate to almost orbicular, elliptic, oblong, or triangular, base broadly cuneate to nearly truncate; stem slender or robust   (2)
2 (1) Stems glabrous   (3)
+ Stems hairy   (5)
3 (2) Leaflets abaxially gray adpressed hairy; raceme 5-13 cm.   8 D. nitida
+ Leaflets abaxially glabrous; raceme 1-4 cm   (4)
4 (3) Raceme 1-4 cm, densely flowered.   5 D. truncata
+ Raceme 5-8 cm, loosely flowered.   9 D. miaoliensis
5 (2) Stems and leaflets with dense long branched hairs; legume not constricted between seeds.   2 D. hirsuta
+ Stems and leaflets with adpressed unbranched hairs; legume sometimes constricted between seeds   (6)
6 (5) Bracts and bracteoles lanceolate, 4-7 mm; leaflets ovate, obovate, or suborbicular, sometimes broader than long.   3 D. forrestii
+ Bracts and bracteoles setiform, 1-2 mm; leaflets distinctly longer than broad   (7)
7 (6) Leaflets adaxially densely adpressed villous; raceme 4-11(-15) cm.   4 D. villosa
+ Leaflets adaxially glabrous; raceme 1-4 cm   (8)
8 (7) Petiolules 2-3 mm; leaflets 2.3-3.5 cm wide, abaxially glabrous.   5 D. truncata
+ Petiolules ca. 1 mm; leaflets 1-2.3 cm wide, abaxially adpressed hairy   (9)
9 (8) Calyx glabrous or sparsely pubescent.   6 D. yunnanensis
+ Calyx densely adpressed pubescent.   7 D. henryi

Lower Taxa


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