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91. Rhynchosia Loureiro, Fl. Cochinch. 2: 425, 460. 1790.
鹿藿属 lu huo shu
Authors: Ren Sa & Michael G. Gilbert
Dolicholus Medikus.
Usually vines, creeping or twining, rarely erect shrubs or subshrubs. Leaves pinnately 3-foliolate; stipules usually caducous; stipels persistent or absent; leaflets usually with sessile glands abaxially. Inflorescence axillary, racemose, sometimes branched or 1-flowered. Bracts usually deciduous, rarely persistent. Calyx campanulate, 5-lobed, upper 2 lobes ± connate, lowest 1 longer. Corolla longer than calyx or short; standard circular or obovate, base with inflexed auricles, with or without appendage; wings and keels subequal, inflexed. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary sessile or subsessile; ovules (1 or)2; style curved above middle, usually hairy at lower part; stigma terminal. Legume oblong, oblanceolate, obovoid-ellipsoid, obliquely orbicular, sickleform, or ellipsoid, dehiscent, compressed or inflated, (1 or)2-seeded, not septate, apex always beaked. Seeds (1 or)2, usually suborbicular or reniform; hilum round, funicle in middle, strophiole small or absent.
About 200 species: worldwide; 13 species (five endemic) in China.
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| 1 |
Legume densely green or yellowish green tomentose |
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(2) |
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Legume glabrous or pubescent |
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(3) |
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| 2 (1) |
Inflorescence densely 40-80-flowered; legume both tomentose and villous. |
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1 R. acuminatissima |
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Inflorescence sparsely ca. 20-flowered; legume densely villous. |
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2 R. lutea |
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| 3 (1) |
Legume oblanceolate or obovate-orbicular to ellipsoid, length:width ratio more than 2:1 |
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(4) |
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Legume obliquely orbicular, oblong, or obovate, length:width ratio less than 2:1 |
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(8) |
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| 4 (3) |
Leaflet apex acuminate or shortly acuminate |
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(5) |
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Leaflet apex rounded or obtuse |
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(6) |
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| 5 (4) |
Terminal leaflet broadly ovate or circular-rhomboid, apex acuminate; flowers lax. |
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12 R. himalensis |
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Terminal leaflet rhomboid, apex shortly acuminate; flowers dense. |
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13 R. kunmingensis |
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| 6 (4) |
Stem slender, glabrous or sparsely pubescent; terminal leaflet 1.5-3 cm long and wide. |
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9 R. minima |
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Stem robust, densely hairy; terminal leaflet 2-8 × 2.5-8 cm |
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(7) |
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| 7 (6) |
Terminal leaflet reniform or oblate, base slightly cordate or almost truncate. |
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10 R. yunnanensis |
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Terminal leaflet circular-rhomboid, base rounded. |
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11 R. sericea |
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| 8 (3) |
Legume obliquely orbicular, inflated; seed 1. |
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3 R. rufescens |
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Legume oblong or obovate, compressed; seeds usually 2 |
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(9) |
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| 9 (8) |
Terminal leaflet apex obtuse, rarely acute. |
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4 R. volubilis |
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Terminal leaflet apex acuminate or caudate-acuminate |
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(10) |
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| 10 (9) |
Inflorescence slender, 1-7 cm. |
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5 R. acuminatifolia |
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Inflorescence robust, 5-27 cm |
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(11) |
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| 11 (10) |
Stem tomentose and sticky with gland-tipped hairs. |
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6 R. viscosa |
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Stem villous or pubescent, gland-tipped hairs absent |
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(12) |
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| 12 (11) |
Terminal leaflet lanceolate to ovate-lanceolate, both sides sparsely pubescent, apex caudate-acuminate; raceme branched; legume glabrous or almost glabrous. |
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7 R. chinensis |
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Terminal leaflet ovate, broadly elliptic, or rhomboid-ovate, both sides densely pubescent, apex acuminate or caudate-acuminate; raceme unbranched; legume pubescent. |
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8 R. dielsii |
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List of lower taxa
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