特徵描述
作者
NAGAMASU, Hidetoshi
型態特徵
Evergreen or deciduous shrubs or trees. Leaves simple, alternate, exstipulate. Inflorescences axillary or terminal racemes, spikes, panicles, fascicles, condensed clusters, or rarely flowers solitary. Flowers with a bract and 2 bracteoles, actinomorphic, bisexual or plants rarely polygamous or dioecious; calyx lobes (3–)5, imbricate or valvate; corolla shallowly or deeply (3–)5(–11)-lobed, lobes imbricate; stamens 4 to many in 1–4 series, inserted on corolla, free, pentadelphous or monadelphous; anthers introrse, bilocular, longitudinally dehiscent; ovary inferior or partially inferior, 2–5-locular; style single, slender, base surrounded by a nectary disk; ovules 2–4 in each locule, pendulous on axile placentae, anatropous, epitropous or amphitropous, unitegmic, tenuinucellate. Pollen grains in monads, 2- or 3-colporate or 3-porate, oblate to oblate-spheroidal. Fruits monopyrenous drupes, usually crowned by persistent calyx lobes; seeds usually solitary in each developed cell, straight or curved, with copious endosperm; embryo straight or curved, with very short cotyledons. Seedlings epigeal, phanerocotylar; cotyledons 2, linear, slightly thick; hypocotyl terete, slender, usually densely papillate; leaves all spirally arranged. x = 11(–14).
屬
One genus with ca. 300–400 species, in moist tropical, subtropical and temperate regions of Asia, Oceania and America; 26 species (8 endemic) with one variety in Taiwan.
引用文獻
-
Brand, A., Das Pflanzenreich Heft 6: 100. 1901.
-
Handel-Mazzetti, H. & E. Peter-Stibal., 62-B: 1-42. 1943.
-
Nooteboom, H. P., Universitaire Pers Leiden Leiden Bot. Ser. 1: 1-336. 1975.
