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93. Dunbaria Wight & Arnott, Prodr. Fl. Ind. Orient. 258. 1834.
野扁豆属 ye bian dou shu
Authors: Ren Sa & Michael G. Gilbert
Herbs or woody vines, prostrate or twining. Leaves pinnately 3-foliolate; stipules caducous or absent; stipels usually absent; leaflets with obvious sessile glands abaxially. Inflorescence axillary, 1-flowered to racemose. Bracts caducous or absent; bracteoles usually absent. Calyx campanulate; lobes lanceolate or triangular, lowest one longest. Corolla ± longer than calyx; standard almost circular, obovate or transversely elliptic, base with auricles; wings usually with auricles; keels shorter than wings, slightly curved. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary stipitate or sessile; ovules many; style filiform, introrse, glabrous; stigma small, terminal, capitate. Legume linear or linear-oblong, dehiscent. Seed hilum long or short; strophiole thin and small.
About 20 species: Asia, Oceania; eight species in China.
Dunbaria was revised by Maesen (Wageningen Agric. Univ. Pap. 98(1). 1998). Dunbaria merrillii Elmer (usually treated as a synonym of D. cumingiana Bentham), otherwise known from Indonesia and the Philippines, was recorded from Taiwan (Lan Yu) (Fl. Taiwan, ed. 2, 3: 275, t. 134. 1993). However, the illustration provided is more suggestive of a species of Cajanus as it shows a large legume, 10-12 cm, distinctly constricted between the seeds, and twisted after dehiscence.
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| 1 |
Terminal leaflet usually ca. 2 × as long as wide; ovary and legume sessile or subsessile |
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(2) |
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Terminal leaflet usually about as long as wide; ovary and legume sessile, subsessile, or stipitate |
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(3) |
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| 2 (1) |
Leaflets ovate, ovate-lanceolate, or lanceolate, 5-9.5 × 2.5-4 cm; flowers in extended racemelike inflorescence, purple. |
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1 D. fusca |
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Leaflets elliptic, ovate-elliptic, or oblong, 1.6-2.6 × 0.5-0.7 cm; flowers solitary, yellow. |
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2 D. debilis |
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| 3 (1) |
Ovary sessile; legume stipe absent or extremely short |
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(4) |
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Ovary stipitate; legume stipe more than 6 mm |
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(6) |
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| 4 (3) |
Terminal leaflet more than 5 cm, abaxial surface and legume tomentose; inflorescence a long, robust, many-flowered raceme; flowers purple. |
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3 D. incana |
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Terminal leaflet 1.5-4 cm, abaxial surface and legume glabrous or sparsely pubescent; inflorescence a 1- to few-flowered fascicle or short raceme; flowers yellow |
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(5) |
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| 5 (4) |
Terminal leaflet orbicular-rhomboid; inflorescence a 1- or 2-flowered fascicle. |
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4 D. rotundifolia |
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Terminal leaflet rhomboid or almost triangular; inflorescence a short raceme, few flowered. |
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5 D. villosa |
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| 6 (3) |
Terminal leaflet obtriangular or obovate, both leaf surfaces and legume sparsely pubescent or glabrous; legume stipe 6-10 mm. |
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8 D. truncata |
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Terminal leaflet almost rhomboid or ovate-rhomboid; legume stipe 15-20 mm |
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(7) |
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| 7 (6) |
Terminal leaflet usually 1.8-4 cm long and wide, apex acute, both leaf surfaces and legume densely grayish pubescent; legume stipe 15-17 mm. |
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6 D. podocarpa |
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Terminal leaflet usually 5-6 cm long and wide, apex acuminate, both leaf surfaces and legume sparsely pubescent or glabrous; legume stipe ca. 20 mm. |
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7 D. circinalis |
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Lower Taxa
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