Onagraceae

柳葉菜科

APG 4

Onagraceae 柳葉菜科

特徵描述

屬列表

標本列表

特徵描述

作者

RAVEN, PETER H. and PENG, CHING-I

型態特徵

Annual, biennial or perennial herbs, sometimes woody. Leaves basal or cauline, alternate or opposite, simple, entire or toothed (rarely lobed); stipules minute or absent. Flowers actinomorphic or zygomorphic, in leaf axils or in inflorescences, generally bisexual (all in Taiwan), 2–7-merous; floral tube present or absent; stamens as many as or twice as many as the sepals; anthers versatile; pollen shed singly or in tetrads, connected by viscin threads; ovary inferior; style single; stigma 4-lobed, clavate or globose. Fruit a capsule, berry, or nut, loculicidal or indehiscent. Seeds anatropous, lacking endosperm, smooth or with tubercles or scales, some with a coma or wings.

屬

Fifteen genera and about 650 species, worldwide but with most genera present in western North America. All four genera that occur as native plants in the Old World have representatives in Taiwan, and a total of 22 species (plus one hybrid) of Onagraceae occur in Taiwan.

參考文獻

RAVEN, PETER H. and PENG, CHING-I, Flora of Taiwan, second edition 3: 937. 1993. (Fl. Taiwan 2nd edit.)

Oenothera 待宵草屬

作者

HOCH, PETER C. and WAGNER, WARREN L.

型態特徵

Annual, biennial or perennial herbs, from a taproot or clumped and spreading by rhizomes or lateral roots. Leaves alternate, often in a basal rosette, entire, toothed, or pinnately lobed; stipules absent. Flowers actinomorphic, 4-merous, in axils of upper reduced leaves, usually opening near sunset; sepals 4, reflexed in flower; petals 4, yellow, white or rose-purple, tip often notched; stamens 8; pollen shed singly; ovary 4-locular; stigma deeply 4-lobed. Fruit a many-seeded capsule, usually dehiscent, straight or curved, terete to 4-ribbed or winged, +/- sessile. Seeds in 2 (1 or 3, not in Taiwan) rows per locule or clustered.

參考文獻

RAVEN, PETER H. and PENG, CHING-I, Flora of Taiwan, second edition 3: 937. 1993. (Fl. Taiwan 2nd edit.)
Dietrich, W. & W.L. Wagner., Systematic Botany Monographs 24: 1-91. 1988. (Syst. Bot. Monogr.)
Munz, P.A, . N. Amer. Fl. II, 5: 1-278. 1965.
Peng, C. I & S. Huang., Botanical bulletin of Academia Sinica 27: 45-51. 1986. (Bot. Bull. Acad. Sin.)