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5. Canscora Lamarck, Encycl. 1: 601. 1785.
穿心草属 chuan xin cao shu
Euphorbiopsis H. Léveillé & Vaniot.
Annuals or perennials. Leaves opposite, sessile, petiolate, or perfoliate. Cymes pseudodichotomous or complex. Flowers 4 or 5merous. Calyx tubular. Corolla usually tubular, salverform, or campanulate. Stamens inserted at apical part of corolla tube, 1 or 2 (or 3) with fertile anthers, 2 or 3 with sterile nonfunctional anthers. Ovary 1locular. Stigma lobes oblong or capitate. Capsules 2valved, many seeded. Seeds suborbicular, compressed; seed coat reticulate.
About 30 species: tropical and subtropical Africa, Asia, and Australia; three species in S China.
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Leaf pairs completely joined into single, orbicular, perfoliate blade; flowers 5merous; corolla campanulate; stamens subequal; plants apparently perennial |
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3 Canscora lucidissima |
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Leaves free, not perfoliate; flowers 4merous; corolla tubular or salverform; stamens clearly unequal; plants annual. |
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(2) |
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| 2 (1) |
Apical leaf blades narrowly ovate; calyx tube 9-11 mm, prominently 8veined; corolla tubular; fertile stamen 1 |
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1 Canscora andrographioides |
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Apical leaf blades cordate; calyx tube 4-5 mm, obscurely 4veined; corolla salverform; fertile stamens 2 or 3 |
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2 Canscora diffusa |
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Lower Taxa
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