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
Dentella 小牙草屬
作者
LIU, Ho-Yih, YANG, T. Y. Aleck, LI, Sung-Po and LI, Hen-Jung
型態特徵
Annual or perennial herbs; stems slender, prostrate, much branched, often forming dense cushions. Leaves without conspicuous lateral veins and veinlets, subsessile or short petiolate; stipules interpetiolar, entire, adnate at base of petioles. Flowers solitary, terminal or in one axil of a pair at alternate nodes and in forks of branches, bisexual; bracts absent; calyx tubular, 5-ribbed, deeply divided, persistent in fruit; corolla funnelform, white, hairy in throat; lobes 2 or 3, induplicate-valvate; stamens 5, filaments adnate slightly above base of corolla tube; ovary 2–4-celled, ovules numerous per cell, style 2-branched, branches filiform, with stigmatic glands on all surfaces; fruit a dry, indehiscent coccus; seeds angular, reticulate.
