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| 1 |
Standard outside glabrous |
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(2) |
| + |
Standard outside densely sericeous |
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(8) |
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| 2 (1) |
Calyx densely sericeous, hirsute, or tomentose; ovary sericeous or tomentose |
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(3) |
| + |
Calyx sparsely pubescent; ovary glabrous |
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(5) |
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| 3 (2) |
Leaflets 7, blades 4-8 × 1-2 cm, apex acuminate to caudate; flowers ca. 1.8 cm; corolla yellow. |
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3 C. fordii |
| + |
Leaflets 7-13, blades 4-13 × 1-4 cm, apex acute; flowers 2.5-3.5 cm; corolla white, creamy, pale pink, or lilac |
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(4) |
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| 4 (3) |
Leaflet blades shiny, glabrous on adaxial surface, rusty pubescent and glabrescent on abaxial surface; ovules numerous; standard with 2 basal calluses. |
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1 C. speciosa |
| + |
Leaflet blades villous on both surfaces; ovules 4-6; standard without basal calluses. |
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2 C. bonatiana |
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| 5 (2) |
Stipules inserted at tip of persistent gibbosity on stem |
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(6) |
| + |
Stipules not inserted at tip of persistent gibbosity on stem |
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(7) |
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| 6 (5) |
Calyx pubescent; legume carmine when dry, oblong, 10-11 cm, convex, suture thickened; panicles ca. 30 cm. |
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4 C. eurybotrya |
| + |
Calyx glabrescent; legume blackened when dry, linear, ca. 15 cm, flat, suture not thickened; panicles 10-20 cm. |
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5 C. reticulata |
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| 7 (5) |
Panicle terminal, branchlets ascending; corolla yellowish white with a pink halo; leaf blade glabrous and shiny, abaxially pale green when dry, secondary and tertiary veins distinct and raised on both surfaces, apex acuminate to caudate. |
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6 C. championii |
| + |
Racemes axillary, pendulous; corolla white or purple; leaf blade flat and rough, abaxially dull grayish green when dry, secondary and tertiary veins indistinct, apex acute. |
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7 C. kiangsiensis |
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| 8 (1) |
Leaflets 3(or 5) |
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(9) |
| + |
Leaflets 5 or 7 (3 or 5 in C. dorwardii) |
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(10) |
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| 9 (8) |
Stipels absent; leaflet blades subleathery. |
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8 C. tsui |
| + |
Stipels present; leaflet blades papery. |
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13 C. sphaerosperma |
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| 10 (8) |
Legume flat, not distinctly contracted between seeds; seeds lenticular |
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(11) |
| + |
Legume inflated, usually distinctly contracted between seeds; seeds globose or reniform |
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(14) |
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| 11 (10) |
Panicles straight, branchlets contiguous, flowers closely arranged |
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(12) |
| + |
Panicles spreading, branchlets slender, flowers laxly arranged |
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(13) |
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| 12 (11) |
Corolla violet to purple; legume stipitate, brown tomentose; leaflet blades ovate-lanceolate or oblong, subleathery; stipels subulate, ca. 2 mm. |
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16 C. nitida |
| + |
Corolla white or pale pink; legume sessile, gray hirsute; leaflet blades broadly elliptic to ovate, papery; stipels filiform, 5-6 mm. |
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17 C. congestiflora |
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| 13 (11) |
Leaflets (5 or)7, blades caudate at apex; panicles long pedunculate. |
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15 C. longipedunculata |
| + |
Leaflets 5, blades acute at apex; panicles subsessile. |
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18 C. dielsiana |
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| 14 (10) |
Branchlets, leaf rachises, and leaflet blades abaxially with dense trichomes, not glabrescent; legume densely brown tomentose |
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(15) |
| + |
Branchlets, leaf rachises, and leaflet blades abaxially with sparse trichomes or glabrescent; legume gray pubescent, yellow tomentose, or gray tomentose |
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(16) |
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| 15 (14) |
Leaflet blades 4-8 cm wide, abaxially brown velutinous; legume 2-2.5 cm wide. |
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9 C. oosperma |
| + |
Leaflet blades 1.8-3 cm wide, abaxially rusty tomentose; legume ca. 1.5 cm wide. |
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14 C. sericosema |
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| 16 (14) |
Panicles compact, branchlets congested; legume not contracted between seeds. |
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12 C. dorwardii |
| + |
Panicles lax, branchlets spread out; legume contracted between seeds |
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(17) |
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| 17 (16) |
Floriferous branchlets slender; leaflet blades obovate; petiolules ca. 4 mm; stipels ca. 4 mm. |
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10 C. cinerea |
| + |
Floriferous branchlets straight; leaflet blades oblong; petiolules 2-3 mm; stipels ca. 1 mm. |
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11 C. gentiliana |
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