特徵描述
屬列表
Achyranthes 牛膝屬
Aerva 絹毛屬
Allmania 砂莧屬
Alternanthera 蓮子草屬
Amaranthus 莧屬
Celosia 青葙屬
Cyathula 川牛膝屬
Deeringia 漿果莧屬
Digera 瘤果莧屬
Gomphrena 千日紅屬
Philoxerus 安旱莧屬
Pupalia 鉤牛膝屬
標本列表
Amaranthus 莧屬
型態特徵
Monoecious, erect or prostrate, sometimes spinous, annual herbs; stems branched, glabrous or pubescent. Leaves petiolate, alternate, entire, penninerved. Flowers unisexual, or polygamous, small, green, occasionally white or purplish, clustered; clusters axillary or terminal spikes or panicles; bracts often tipped with spines, sometimes minute; bracteoles 2; perianth-segments 3 or 5, rarely 4, membranaceous, glabrous; stamens 2–5, filaments free, anthers 2-celled; ovary ovoid, with an erect ovule, style very short, stigmas 2–4, filiform. Utricles laterally compressed, indehiscent or circumscissile; seed solitary, lenticular, shining, smooth, with annular embryo.
Species about 50, of world-wide distribution; four species in Taiwan.
