特徵描述
作者
YANG, YUEN-PO, SHIH, BING-LING and LIU, HO-YIH
型態特徵
Monoecious, dioecious or rarely polygamous herbs, shrubs, or trees, with or without stinging hairs; cystoliths usually present in epidermal cells. Leaves alternate or opposite, sometimes anisophyllous with nanophylls (reduced leaves), petiolate or sessile, usually stipulate. Inflorescences often cymose glomerules, or sessile and condensed cymes in leaf axils, sometimes a head or a single flower. Flowers minute, unisexual or rarely bisexual, actinomorphic or zygomorphic, mostly green; perianth a single whorl or rarely absent. Male flowers: perianth segments 2-5, mostly free or connate in lower half; stamens 2-5, inflexed in bud, anthers basifixed, longitudinally dehiscent, rudimentary ovary often present. Female flowers: perianth segments 2-5, free or somewhat completely connate; staminodes present or absent; ovary superior, 1-loculed, stigma capitate, penicillate, ligulate or filiform; ovule 1, basal. Fruit an achene or drupe, sometimes enclosed by persistent perianth; seed with thin testa; embryo straight, surrounded by oily endosperm.
屬
About 45 genera with about 1,000 species, widely distributed in the tropical and temperate regions; 21 genera in Taiwan.
參考文獻
Boehmeria 苧麻屬
作者
YANG, YUEN-PO, SHIH, BING-LING and LIU, HO-YIH
型態特徵
Small monoecious or dioecious trees, shrubs or perennial herbs and usually woody at base. Leaves alternate or opposite, 3-nerved, petiolate, cystoliths punctiform; stipules free or rarely connate at base, caducous or deciduous. Inflorescences spicate, racemose or paniculate; bracts and bracteoles small, scarious. Male flowers: perianth (3-)4(-5)-lobed or parted, segments valvate; stamens (3-)4(-5); rudimentary ovary clavate or subglobose. Female flowers: perianth tubular, 2-4-toothed at apex, sometimes enlarged and dilated into 2 acute angles or wings in fruit; ovary included; stigma filiform, pilose on one side, persistent. Achenes completely surrounded by perianth.
參考文獻
種列表
- Boehmeria boninensis
- Boehmeria celebica
- Boehmeria clidemioides 序葉苧麻
- Boehmeria densiflora 密花苧麻
- Boehmeria formosana 台灣苧麻
- Boehmeria hwaliensis 花蓮苧麻
- Boehmeria longispica 長穗苧麻
- Boehmeria macrophylla 水苧麻
- Boehmeria nivea var. tenacissima 青苧麻
- Boehmeria nivea 苧麻
- Boehmeria pilosiuscula 華南苧麻
- Boehmeria pilushanensis 畢祿山苧麻
- Boehmeria sp.
- Boehmeria wattersii 長葉苧麻
