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Ranunculaceae

毛茛科

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特徵描述

作者

YANG, T. Y. ALECK and HUANG, TSENG-CHIENG

型態特徵

Mainly annual or perennial herbs, sometimes small shrubs or woody climbers, rarely polygamous or dioecious herbs. Leaves simple or compound, radical or cauline, often divided, mostly alternate but opposite in Clematis; stipules mostly absent or present, adnate to petiole, rarely free. Inflorescence cymes, racemes, panicles or flower solitary. Flowers bisexual, rarely unisexual, actinomorphic (regular), or zygomorphic (irregular). Petals hypogynous, free, imbricate or valvate in Clematis, deciduous. Sepals 4 or 5, green or colored. Petals 4 or 5 or more, or absent, well developed or sometimes reduced to nectaries, spur present or absent, usually at base. Stamens hypogynous, numerous, free, spirally arranged; anthers 2-celled, introrse, longitudinally dehiscent. Carpels few to many, rarely solitary, free, spirally arranged or whorled, 1-celled; styles short to long; ovules 1-many, anatropous, erect or pendulous. Fruits achene or follicles, sometimes capsules or berries; seeds 1-many, small, albuminous, embryo minute.

About 58 genera with 1,750 species, worldwide, but mainly in the north temperate and frigid areas; 10 genera and 31 species in Taiwan.

參考文獻

Clematis 鐵線蓮屬

作者

YANG, T. Y. ALECK and HUANG, TSENG-CHIENG

型態特徵

Herbaceous, suffruticose or woody scandent vines or erect shrubs or subshrubs. Leaves opposite, simple, ternate, pinnate, bi-ternate, bi-pinnate or tri-pinnate; petiole present or absent. Inflorescence a cyme, dichasium, fascile, panicle or umbel-like or flowers solitary. Flowers bisexual, or sometimes plants polygamous, rarely plants dioecious, color various; sepals mostly 4, sometimes 6 or 8; stamens numerous, glabrous or pubescent; staminodes absent or present, petal-like; carpels numerous, ovaries glabrous or pubescent; style persistent, elongating and becoming caudate after anthesis. Achenes glabrous or pubescent, usually with a long hairy tail.

參考文獻

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