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5. Cyathula Blume, Bijdr. Fl. Ned. Ind. 548. 1826.
[nom. cons., not Loureiro (1790).]
杯苋属 bei xian shu
Herbs or subshrubs. Stem erect or ascending. Leaves opposite, petiolate, margin entire. Flowers clustered in cymose partial inflorescences, 1-3 in each cluster, hermaphroditic, partly accompanied by sterile ones. Bracts ovate, membranous, often spiny. Tepals 5, nearly equal, membranous. Stamens 5; anther 2-loculed, oblong; filaments connate into a short cup at base, alternating with dentate or lacerate staminodes. Ovary obovoid; ovule 1, pendulous from a long funicle; style filiform, persistent; stigma capitulate. Utricles included in persistent perianth, globose, ellipsoid, or obovoid, membranous, indehiscent. Seeds oblong or ellipsoid.
About 27 species distributed in Asia, Pacific Islands, Africa, and North and South America; four species in China.
Cyathula semirosulata Masamune (Trans. Nat. Hist. Soc. Taiwan 33: 111. 1943) was described from Hainan, but we have seen no specimens and are therefore unable to treat it in this account. Further revisionary study is necessary.
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| 1 |
Subshrubs, 10-20 cm; leaves elliptic. |
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4 C. tomentosa |
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Herbs perennial; leaves rhombic-obovate, rhombic-oblong, broadly ovate, obovate-oblong, or elliptic. |
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(2) |
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| 2 (1) |
Stem ascending or erect; leaves rhombic-obovate or rhombic-oblong; flower clusters in racemes. |
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1 C. prostrata |
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Stem erect; leaves not rhombic-obovate or rhombic-oblong; flower clusters in spikes. |
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(3) |
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| 3 (2) |
Leaves broadly ovate or obovate-oblong; flowers grayish black when dried; staminodes 0.6-1 mm. |
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2 C. capitata |
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Leaves elliptic or narrowly elliptic, rarely obovate; flowers white when dried; staminodes 0.3-0.4 mm. |
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3 C. officinalis |
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Lower Taxa
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