特徵描述
作者
LIU, Ho-Yih, YANG, T. Y. Aleck, LI, Sung-Po and LI, Hen-Jung
型態特徵
Trees, shrubs, lianas, or herbs. Leaves simple, mostly entire, commonly decussately opposite, often with connate interpetiolar stipules, or sometimes whorled, or rarely stipules intrapetiolar. Inflorescence basically cymose, terminal or lateral, rarely solitary flowers. Flowers mostly complete, rarely unisexual, nearly always epigynous, often heterostyle, zoophilous or rarely anemophilous, actinomorphic or rarely zygomorphic, often tetramerous or pentamerous. Calyx adnate to the ovary, aestivation open, lobes minute or obsolete, sometimes one or more enlarged and colored. Corolla sympetalous, salverform, rotate or funnelform. Stamens as many as and alternate corolla lobes, attached within corolla tube or at mouth; anthers dithecal, opening longitudinally. Ovary nearly always inferior, often bicarpellate; style single, terminal; stigma capitate or lobed. Fruit a capsule, berry, drupe, or schizocarp.
屬
About 630 genera, especially abundant in tropical and subtropical regions; 38 genera in Taiwan.
參考文獻
Rubia 茜草屬
作者
YANG, T. Y. Aleck
型態特徵
Perennial climbing or erect diffused herbs, sometimes shrubby at the base, often scabrid-hispid, prickly or sometimes glabrous; branches 4-angled or subterete. Leaves 4–12 in a whorl, rarely opposite and stipulate. Flowers in axillary and terminal cymes; pedicels jointed with the ovary; calyx tube ovoid or globose, the limb 0; corolla rotate or shortly bell- or funnelform, 4–5-lobed, valvate in bud; stamens 4–5, inserted on corolla tube, filaments short, anthers globose or oblong; style 2 or 2-fid, stigma capitate, ovary 2-celled; ovules 1 in each cell, erect, attached to septum. Fruits fleshy, globose, didymous.
