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