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19. Cyclea Arnott ex Wight, Ill. Ind. Bot. 1: 22. 1840.
轮环藤属 lun huan teng shu
Paracyclea Kudô & Yamamoto.
Vines. Petiole usually long; leaf blade peltate, palmately veined. Inflorescences axillary, terminal or on old stems, thyrsoid, usually narrow, rarely broad and sparse; bracts small. Male flowers: sepals usually 4 or 5(or 6), usually connate, 4- or 5-lobed, rarely free; petals 4 or 5, usually connate, entire or 4-8-lobed, rarely free, sometimes absent; stamens 4 or 5, connate into a peltate synandrium, anthers dehiscing transversely. Female flowers: sepals and petals 1 or 2, opposite to each other, rarely absent; carpel 1, stigma short, 3- or many lobed. Drupes obovate-globose to rotund, often slightly flat, style scar near base; endocarp bony, horseshoe-shaped, abaxially bearing 2 or 3 rows of tubercles on both surfaces of rib; condyle usually 1 or 2 cavities, often perforate between style scar and base. Seed horseshoe-shaped; embryo terete, embedded in endosperm.
About 29 species: S and SE Asia; 13 species (five endemic) in China.
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| 1 |
Inflorescences cauliflorous or on leafless old branches, broad and large, many branched. |
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13 C. polypetala |
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Inflorescences axillary on normal leafy shoots, narrow and few branched (except C. barbata) |
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(2) |
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| 2 (1) |
Male inflorescences broad and large, many branched. |
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1 C. barbata |
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Male inflorescences narrow, thyrsoid, few branched, sometimes spikelike |
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(3) |
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| 3 (2) |
Male flowers with sepals conspicuously connate |
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(4) |
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Male flowers with sepals free or only connate at base |
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(7) |
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| 4 (3) |
Male sepals forming cup, lobes ca. as long as tube; leaves and branchlets hispid; petioles not peltately inserted. |
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10 C. meeboldii |
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Male sepals not forming cup, lobes much shorter than tube; leaves and branchlets puberulent or subglabrous; petioles ± peltately inserted |
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(5) |
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| 5 (4) |
Male sepals urceolate, pubescent. |
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12 C. tonkinensis |
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Male sepals mitriform, glabrous |
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(6) |
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| 6 (5) |
Synandrium not exserted; male sepals 2.5-4 mm. |
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5 C. racemosa |
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Synandrium exserted; male sepals ca. 2 mm or shorter. |
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11 C. debiliflora |
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| 7 (3) |
Rachis and drupes glabrous |
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(8) |
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Rachis and drupes pubescent to hispid |
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(10) |
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| 8 (7) |
Endocarp ca. 7 mm. |
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2 C. sutchuenensis |
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Endocarp less than 5.5 mm |
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(9) |
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| 9 (8) |
Endocarp subtruncate or slightly emarginate; leaves 2.5-7 × 1.5-4 cm, glabrous or sparsely pilose, not papillate. |
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3 C. hypoglauca |
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Endocarp tapered at base; leaves 6-12 × 3-5.5 cm, abaxially densely setose or papillate. |
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4 C. wattii |
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| 10 (7) |
Leaf blade with margins coarsely 1- or 2-toothed. |
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9 C. ochiaiana |
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Leaf blade with margins entire or sparsely serrate |
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(11) |
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| 11 (10) |
Female flowers with petals as long as sepals; male flowers with petal 1 or absent. |
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8 C. gracillima |
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Female flowers with petals much smaller than sepals (female flowers unknown in C. longgangensis) |
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(12) |
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| 12 (11) |
Male sepals mitriform, 2.5-4 mm. |
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5 C. racemosa |
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Male sepals not mitriform |
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(13) |
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| 13 (12) |
Leaf margin long pubescent; male sepals oblong-elliptic. |
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6 C. longgangensis |
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Leaf margin shortly puberulent; male sepals obovate or spatulate. |
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7 C. insularis |
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List of lower taxa
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Treatments in Other Floras @ www.efloras.org
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