Iteaceae
鼠刺科
特徵描述
[ Saxifragaceae 虎耳草科 ]
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
Itea 鼠刺屬
作者
KAO, MUH-TSUE
型態特徵
Evergreen or deciduous small trees or shrubs. Leaves alternate, petiolate, glabrous, glandular-dentate or crenate, estipulate. Inflorescence a terminal or axillary raceme or panicle. Flowers white, small; calyx-tube adnate to the base of the ovary, with 5 persistent lobes; petals 5, perigynous, oblong, valvate in bud; stamens 5, perigynous, with filiform-subulate filaments; ovary 2-celled; styles short, the stigma capitate; ovules few to numerous. Capsule oblong to conical, crowned with the persistent calyx-teeth, few to many-seeded; seeds elongate, the testa loose or less produced at both ends.
About 10 or more species, one in eastern North America and the rest in eastern Asia to eastern India and Java. Two species in Taiwan.
