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
Circaea 露珠草屬
作者
RAVEN, PETER H. and PENG, CHING-I
型態特徵
Perennial rhizomatous herbs, often forming large colonies. Leaves petiolate, opposite, becoming alternate and bract-like in inflorescence. Inflorescence terminal on main stem and at tips of short axillary branches, a simple or branched raceme. Flowers white or pink, 2-merous, with a floral tube; ovary uni- or bilocular; ovules 1 per locule; sepals and petals alternate, stamens opposite sepals; petals notched at apex; nectary surrounding base of style, wholly within floral tube or elongated and projecting as a fleshy, cylindrical or ring-like disc; style equalling or longer than stamens, stigma 2-lobed. Fruit an indehiscent capsule, covered with stiff uncinate hairs; with or without conspicuous rows of corky tissue. Seeds smooth, fusiform or broadly clavoid to slenderly ovoid, adhering firmly to inner ovary wall. n=11.
