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| 1 |
Ovary tomentose |
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(2) |
| + |
Ovary glabrous |
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(3) |
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| 2 (1) |
Terminal bud large, terete, puberulent; leaf blade oblong-elliptic to oblong; flowers ca. 4 cm in diam.; bracteoles ± covering pedicel; seeds yellow pubescent. |
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1 C. chrysanthoides |
| + |
Terminal bud small, ovoid, glabrous; leaf blade broadly obovate, obovate-elliptic, or elliptic; flowers 1.5-2.5 cm in diam.; bracteoles not covering pedicel; seeds glabrous. |
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2 C. micrantha |
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| 3 (1) |
Terminal buds oblong, large; current year branchlets, petioles, and abaxial surface of leaf blades pubescent; leaf blade midvein and secondary veins adaxially clearly impressed. |
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3 C. impressinervis |
| + |
Terminal buds ovoid, small; current year branchlets, petioles, and abaxial surface of leaf blades glabrous; leaf blade midvein flat or slightly impressed and secondary veins adaxially not impressed, slightly impressed, or impressed |
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(4) |
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| 4 (3) |
Bracteoles 7-10; flowers (2-)5-6 cm in diam.; petals golden yellow, fleshy; capsule (1.5-)4-6 cm in diam |
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(5) |
| + |
Bracteoles 5 or 6; flowers 1.5-4.5 cm in diam.; petals yellow or pale yellow, membranous; capsule 1.5-3.5 cm in diam. ((4-)6-8 cm in C. fascicularis) |
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(6) |
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| 5 (4) |
Pedicel (5-)10-15 mm; bracteoles spreading, not covering pedicel, glabrous; sepals glabrous or inside white puberulent, margin ciliolate. |
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4 C. petelotii |
| + |
Pedicel ca. 5 mm; bracteoles appressed and covering pedicel, inside white sericeous; sepals inside white sericeous. |
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5 C. euphlebia |
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| 6 (4) |
Sepals yellowish green, membranous; petals 0.4-1 cm in diam.; capsule 1.5-3 cm in diam.; seeds glabrous |
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(7) |
| + |
Sepals green, leathery; petals 0.8-4(-5) cm in diam.; capsule 2.5-3.5(-8) cm in diam.; seeds pubescent, pilose, or villous |
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(8) |
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| 7 (6) |
Leaf blade elliptic, obovate-elliptic, or oblong-ovate, secondary veins adaxially slightly impressed; sepals inside glabrous. |
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9 C. indochinensis |
| + |
Leaf blade ovate, secondary veins adaxially visible to obscure; sepals inside white puberulent. |
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10 C. pingguoensis |
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| 8 (6) |
Petiole 0.3-1 cm; pedicel 3-5 mm, bracteoles ± covering pedicel. |
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8 C. flavida |
| + |
Petiole 0.7-1.5 cm; pedicel 6-10 mm, bracteoles not covering pedicel |
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(9) |
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| 9 (8) |
Leaf blade 10-19.5 × 5-9.5 cm, apex abruptly and shortly caudate to caudate; sepals 7-9 mm; capsule globose to oblate, (4-)6-8 cm in diam. |
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6 C. fascicularis |
| + |
Leaf blade 7.5-11.5 × 3-5 cm, apex shortly acuminate; sepals ca. 5 mm; capsule oblate, 3-3.5 cm in diam. |
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7 C. huana |
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