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Menispermaceae

防己科

特徵描述
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特徵描述

作者

HUANG, SHING-FAN and HUANG, TSENG-CHIENG

型態特徵

Climbing or twining, rarely erect, woody or suffruticose, dioecious plants. Leaves alternate, usually palmately veined and often lobed; stipules absent. Flowers small, usually in axillary racemes, sometimes panicles, solitary cymes or discoid heads, regular or rarely slightly irregular, 3-bracteolate; sepals usually 6, in 2 whorls, imbricate, outer whorl often smaller; petals 6, usually smaller than sepals, sometimes wanting, free or connate. Male flowers: stamens 3-12, free or connate, 2-celled; rudimentary carpels small or absent. Female flowers: staminodes 6 or absent; carpels usually 3, rarely 1 or 6 or more, free, sessile or stipitate; style terminal, simple or divided; ovule solitary, usually amphitropous. Ripe carpels drupaceous, usually strongly curved, stipitate or sessile, endocarp usually sculptured, bony or chartaceous. Seeds usually hook-shaped or reniform, often curved; endosperm smooth or ruminate or absent; embryo usually curved, cotyledons flat or semiterete.

About 63 genera and over 200 species, chiefly in the tropics; six genera in Taiwan.

參考文獻

Stephania 千金藤屬

作者

HUANG, SHING-FAN and HUANG, TSENG-CHIENG

型態特徵

Climbing shrubs. Leaves peltate. Flowers in axillary, simple racemose or umbellate discoid heads. Male flowers: sepals 6-10, free, ovate or obovate, concave, subequal; petals 3-5, obovate, fleshy; stamens connate into a column, anther cells splitting transversely. Female flowers: sepals 3-5; petals 2-4, obovate, fleshy; staminodes absent; ovary 1, style 3-6-partite. Drupes glabrous; endocarp compress-ed, horseshoe-shaped, dorsally tubercled, laterally concave and perforated. Seeds almost annular; cotyledons long, slender, half-terete, appressed.

參考文獻

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