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| 1 |
Limb of outer petals broad, dentate; upper petal with short broad dentate crest not reaching apex |
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(2) |
| + |
Limb of outer petals not dentate; crest of upper petal, if present, entire and often reaching or exceeding apex |
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(3) |
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| 2 (1) |
Branches broadly spreading, arcuate; ultimate leaflets rounded, entire; spur curved almost in a semicircle. |
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102 C. liana |
| + |
Branches straight, suberect; leaflets ternatifid to pinnatifid or deeply dentate; spur straight or slightly curved. |
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103 C. tenerrima |
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| 3 (1) |
Nectary ca. 1/2 as long as spur or shorter, sometimes very thin |
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(4) |
| + |
Nectary ca. 2/3 as long as spur or longer, sometimes very thin, rarely absent |
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(5) |
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| 4 (3) |
Delicate climber; pedicels very thin, strongly deflexed at base so racemes appear "upside down"; corolla ecristate; nectary very thin (W Yunnan). |
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104 C. saltatoria |
| + |
Erect, robust plant; racemes straight; pedicels not deflexed; corolla broadly crested; nectary thick (S Xizang). |
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95 C. laelia |
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| 5 (3) |
Spur usually straight; dorsal crests of inner petals not overtopping petal apex; racemes simple; stigma with apical papillae not stipitate, with median sinus absent or shallow, vasculature T-shaped, with lateral and basal geminate papillae, basal corners not prolonged, style weak immediately below stigma (C. davidii group) |
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(6) |
| + |
Spur upcurved; dorsal crests of inner petals ± overtopping petal apex; racemes simple or branched; stigma with apical papillae stipitate, median sinus dividing stigma to 1/3, vasculature V-shaped, basal corners usually without papillae, usually prolonged like "earlobes," style firm all the way into stigma (C. yunnanensis group) |
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(9) |
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| 6 (5) |
Bracts 6-12 × 2-4 mm; racemes very lax. |
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91 C. luquanensis |
| + |
Bracts much smaller |
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(7) |
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| 7 (6) |
Crest of outer petals ca. 1 mm wide; petioles of middle leaves basally with rounded auricles; stigma with 10 marginal papillae; racemes lax. |
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92 C. triternatifolia |
| + |
Crest of outer petals less than 0.5 mm wide or absent; petioles vaginate at base, but not auriculate; stigma with 6 or 8 marginal papillae; racemes dense |
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(8) |
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| 8 (7) |
Upper petal 20-28 mm, without or with narrow crest, spur cylindric; racemes 5-15-flowered, peduncle ± equaling raceme; seeds 1.5-1.7 mm. |
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93 C. davidii |
| + |
Upper petal 17-20 mm, narrowly crested; spur tapering toward apex; racemes 10-26-flowered, peduncle much shorter than raceme; seeds 0.9-1.1 mm. |
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94 C. longicornu |
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| 9 (5) |
Racemes 4-8-flowered; spur ca. 1/3 as wide as long, ca. as long as inner petals; nectary conspicuous, ca. 2/3 of spur (S Xizang). |
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101 C. delicatula |
| + |
Racemes 10-25-flowered; spur narrower, usually longer than inner petals; nectary longer |
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(10) |
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| 10 (9) |
Stems 2-4 mm thick at base; racemes usually simple, not in a panicle; stigma basally truncate, apically with shortly stalked papillae. |
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100 C. yunnanensis |
| + |
Stems 4-8 mm thick at base; racemes clustered, often branched; stigma with obvious basal lobes and long-stalked apical papillae |
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(11) |
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| 11 (10) |
Climber, 2-4 m; ovules ca. 15. |
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99 C. ampelos |
| + |
Erect, 0.4-1.3 m; ovules 7-10 |
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(12) |
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| 12 (11) |
Crest of upper petal narrow or absent, not reaching apex. |
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98 C. delphinioides |
| + |
Crest of upper petal broad, overtopping apex |
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(13) |
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| 13 (12) |
Leaflets 5-13 × 4-9 mm; bracts spatulate, clearly longer than pedicels; stigma narrowed at base, with basal "auricles" clinging to style; capsule obovoid, with seeds in 2 rows. |
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97 C. auricilla |
| + |
Leaflets larger; bracts linear, equaling pedicels; stigma not narrowed at base; capsule narrowly oblong, with seeds in 1 row. |
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96 C. pterygopetala |
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