Myrtaceae

桃金孃科

APG 4

Myrtaceae 桃金孃科

特徵描述

屬列表

標本列表

特徵描述

作者

CHANG, CHING-EN

型態特徵

Shrubs or trees. Leaves opposite, sometimes alternate, coriaceous, more or less pellucido-punctate, simple, estipulate. Flowers bisexual, actinomorphic, solitary in the axils or in corymbs or racemes, usually bracteate; calyx-tube more or less adnate to the ovary and often elongated, sepals 4–5, imbricate, or rarely absent; stamens mostly numerous in several rows, often in fascicles opposite petals, filaments distinct or partially united, anthers 2-celled, introrse, dehiscing longitudinally or sometimes apically; ovary inferior, 1 to many-celled, with 1 to many ovules in each cell; placentation axile, rarely parietal; styles terminal, sometimes lateral; stigma undivided. Fruit a berry or loculicidal capsule, rarely drupaceous or nutlike; seeds few or many, embryo variously shaped, endosperm scanty or none.

屬

About 9 genera and 3,000 species, native in tropical and subtropical regions; four genera in Taiwan.

參考文獻

CHANG, CHING-EN, Flora of Taiwan, second edition 3: 886. . (Fl. Taiwan 2nd edit.)

Syzygium 赤楠屬

作者

CHANG, CHING-EN

型態特徵

Evergreen trees or shrubs. Leaves opposite, coriaceous or membranaceous, penninerved. Flowers in racemes, cymes or panicles; calyx-tube globose or more or less elongated, lobes 4 or 5; petals 4 or 5; free or connate into a small hood (calyptra), mostly early caducous; stamens numerous, in 1 to numerous rows, occasionally united into 4 bundles, filaments filiform, anther sacs parallel and opening longitudinally; ovary 2–3-celled, styles filiform, stigma small; ovules numerous in each cell. Berry drupaceous, crowned with the persistent calyx-limb. Seeds few, globose or variously compressed; seedcoat loosely or closely adhering to the pericarp; embryo divided, i. e., with distinct cotyledons.