| 1 |
Leaves dimorphic, lower leaves petiolate with obovate leaflets and distinct rachis, upper leaves sometimes subsessile |
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(2) |
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Leaves not dimorphic |
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(3) |
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| 2 (1) |
Upper leaflets deltoid. |
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10 C. diversifolia |
| + |
Upper leaflets elliptic, orbicular, or transversely elliptic. |
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13 C. harmsii |
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| 3 (1) |
Leaflets consistently stipellate |
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(4) |
| + |
Leaflets estipellate, rarely including a few leaves with rudimentary stipels |
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(5) |
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| 4 (3) |
Glandular hairs present on pedicel, calyx, and inflorescence rachis. |
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22 C. polyantha |
| + |
Glandular hairs absent. |
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32 C. yunnanensis |
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| 5 (3) |
Glandular hairs present on pedicel, calyx, and inflorescence rachis |
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(6) |
| + |
Glandular hairs absent from pedicel and calyx |
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(19) |
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| 6 (5) |
Calyx lobes more than 2 × as long as tube, more than 3 mm |
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(7) |
| + |
Calyx lobes usually as long as tube or, if longer, less than 2 × as long as tube |
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(8) |
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| 7 (6) |
Bracts narrowly ovate, usually shorter than 3 mm; leaflet adaxially glabrous. |
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9 C. delavayi |
| + |
Bracts linear, usually more than 3.5 mm; leaflet adaxially densely puberulent. |
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21 C. pinetorum |
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| 8 (6) |
Leaflet adaxially ± densely puberulent with spreading, very short hairs, rarely glabrescent; branches velutinous |
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(9) |
| + |
Leaflet adaxially glabrous or ± densely pubescent; branches not velutinous |
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(11) |
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| 9 (8) |
Leaves and stems with white hairs; leaflets broadly elliptic to ovate, often more than 8 cm. |
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17 C. latifolia |
| + |
Leaves and stems with tawny to pale brown hairs; leaflets narrowly ovate to elliptic, usually less than 7 cm |
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(10) |
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| 10 (9) |
Racemes extended, often more than 10 cm; bracts narrowly ovate, 2-2.5 mm; bracteoles ca. 1 mm. |
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11 C. fulva |
| + |
Racemes usually less than 9 cm; bracts narrowly ovate, 3-5 mm; bracteoles ca. 2 mm. |
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25 C. sulcata |
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| 11 (8) |
Flowers small; standard usually less than 9 mm |
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(12) |
| + |
Flowers larger; standard usually more than 10 mm |
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(14) |
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| 12 (11) |
Legumes more than 10 mm; leaflet abaxially densely white pubescent. |
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18 C. luhitensis |
| + |
Legumes less than 8 mm |
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(13) |
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| 13 (12) |
Leaflet abaxially with sparse appressed short hairs; legume apex obtuse. |
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7 C. cytisoides |
| + |
Leaflet abaxially with dense white silky hairs; legume apex rounded. |
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28 C. thomsonii |
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| 14 (11) |
Leaflets usually less than 1 cm, obdeltoid. |
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31 C. wilsonii |
| + |
Leaflets usually more than 2 cm, not obdeltoid |
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(15) |
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| 15 (14) |
Bracts usually caducous before flowering. |
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19 C. macrocarpa |
| + |
Bracts mostly persistent until fruiting |
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(16) |
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| 16 (15) |
Inflorescence usually a panicle; bracts mostly more than 2 mm; petioles not abaxially angled |
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(17) |
| + |
Inflorescence not a panicle; bracts mostly less than 2 mm |
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(18) |
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| 17 (16) |
Leaflets deltoid to ovate, lateral veins thick, prominent abaxially. |
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15 C. hirtella |
| + |
Leaflets obovate to oblong, lateral veins not prominent. |
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2 C. alopochroa |
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| 18 (16) |
Petioles sulcate, neither abaxially angled nor winged. |
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8 C. decora |
| + |
Petioles abaxially angled, often slightly convex above, bisulcate and narrowly winged along both sides. |
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14 C. henryi |
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| 19 (5) |
Petioles abaxially angled, often narrowly winged along both sides; young branches distinctly angled |
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(20) |
| + |
Petioles neither abaxially angled nor winged |
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(21) |
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| 20 (19) |
Young branches quadrangular; corolla purple. |
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12 C. grandifolia |
| + |
Young branches triquetrous; corolla yellow or purple. |
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29 C. trigonoclada |
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| 21 (19) |
Calyx lobes ca. 3 × as long as tube; flowers subsessile, clustered at top of peduncle as an umbel; leaflet adaxially white pubescent. |
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1 C. alba |
| + |
Calyx lobes usually nearly equal to tube or, if longer, less than 2 × as long as tube; inflorescences not umbelliform |
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(22) |
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| 22 (21) |
Leaflet adaxially densely puberulent |
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(23) |
| + |
Leaflet adaxially glabrous, sparsely pubescent, or sericeous |
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(24) |
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| 23 (22) |
Calyx, inflorescence, young branches, and leaflets abaxially densely appressed sericeous; leaflets elliptic to oblong. |
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3 C. argentea |
| + |
Calyx, inflorescence, young branches, and leaflets abaxially densely white villous; leaflets obdeltoid to broadly obovate. |
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5 C. brevifolia |
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| 24 (22) |
Pedicels usually less than 5 mm |
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(25) |
| + |
Pedicels usually more than 5 mm |
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(28) |
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| 25 (24) |
Flowers clustered at upper part of racemes |
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(26) |
| + |
Flowers distributed equally in racemes |
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(27) |
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| 26 (25) |
Flowers larger; standard ca. 10 mm; pedicels more than 1.5 mm; racemes not terete. |
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16 C. howellii |
| + |
Flowers small; standard ca. 7 mm; pedicels less than 1.5 mm; racemes terete, very densely flowered, spikelike. |
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27 C. teretiracemosa |
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| 27 (25) |
Legumes ovoid to elliptic, pubescent; inflorescences racemose. |
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24 C. speciosa |
| + |
Legumes narrowly ovoid to narrowly elliptic, lateral surface glabrous; inflorescences paniculate. |
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30 C. wenshanica |
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| 28 (24) |
Flowers less than 8 per raceme |
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(29) |
| + |
Flowers 10 or more per raceme |
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(30) |
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| 29 (28) |
Pedicels more than 15 mm; vexillary stamen connate to tube at base for ca. 1/6 of its length. |
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20 C. pauciflora |
| + |
Pedicels less than 8 mm; vexillary stamen connate to tube at base for ca. 1/3 of its length. |
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26 C. tenuiramea |
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| 30 (28) |
Leaflets obdeltoid to obcordate; lateral veins dense, straight, parallel. |
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4 C. bonii |
| + |
Leaflets elliptic to obovate; lateral veins arcuate with net venation |
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(31) |
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| 31 (30) |
Pedicels slender, 6-20 mm; leaflets papery. |
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6 C. capillipes |
| + |
Pedicels stout, 4-6 mm; leaflets subleathery. |
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23 C. sargentiana |
