特徵描述
作者
KAO, MUH-TSUE
型態特徵
Herbs, shrubs or small trees. Leaves alternate or opposite, usually without stipules; blade simple or compound. Inflorescences basically cymose, sometimes racemose to paniculate. Flowers bisexual or polygamo-dioecious, regular, hypogynous or perigynous; sepals or calyx-lobes 4–5, free or united, imbricate or valvate; petals 4–5, rarely 0, imbricate or valvate; stamens inserted with the petals, equalling or doubling their number; staminodes or glands sometimes present between the stamens and ovary; carpels 2–5, wholly or partly connate, rarely separate; styles as many as the carpels, distinct or connate nearly to the summit, the stigmas capitate or lateral and subcapitate, ovules numerous, erect or pendulous. Fruit a capsule or berry; seeds numerous, small, winged, albuminous; embryo small, the cotyledons flat.
屬
About 80 genera and 1,200 species, widely distributed, chiefly in the cold and temperate regions; 13 genera, 23 species and two varieties in Taiwan.
參考文獻
Pileostegia 青棉花屬
作者
KAO, MUH-TSUE
型態特徵
Evergreen glabrous trees or shrubs, climbing by rootlets. Leaves opposite, entire or dentate, petiolate. Flowers whitish, small, all fertile, in terminal, broad, stalked, corymbose panicles; calyx-tube conical, adnate to the ovary, the lobes 4–5, small, imbricate; petals 4–5, valvate, caducous, connate at the apex and falling off as a whole; stamens 8–10, inserted on the margin of the epigynous disc, with long filaments and short ovate anthers; ovary inferior, 4–5-celled; styles short, clavate, with 4–6-lobed stigma; ovules numerous. Fruit a capsule, 4–5-celled, dehiscing irregularly along the ribs. Seeds numerous, oblong, slightly compressed, the testa produced terminally.
