作者

LIAO, JIH-CHING

型態特徵

Monoecious deciduous trees and shrubs. Leaves alternate, simple, straight-veined, petioled; stipules fugacious. Staminate flowers in long pendulous catkins, 1–6 clustered together in axils of bracts; calyx 2–4, parted or not; stamens 2–20; pistillate flowers in short lateral or capitate catkins, with or without calyx, adnate to the ovary; ovary 2-celled, each cell with 1 ovule; style 2-parted. Fruit a nut or samara, indehiscent, 1-celled, 1-seeded.

屬

Six genera and about 150 species mostly in the northern hemisphere, some planted for ornament and others for the edible nuts.

參考文獻