特徵描述
作者
YANG Yuen-Po , LU Sheng-You and CHEN Tien-Tsai
型態特徵
Shrubs or trees, rarely herbs. Leaves opposite or rarely verticillate, simple or compound, estipulate. Inflorescence terminal or axillary, cymes, racemes, spikes or thyrses, sometimes capitate. Flowers bisexual or polygamous, zygomorphic or sometimes actinomorphic. Calyx gamosepalous, persistent, 4 or 5-lobed. Corolla gamopetalous, 4 or 5-lobed, lobes equal to subequal sometimes with a conspicuous lip. Stamens 4, didynamous and unequal or equal, alternate corolla lobes. Ovary superior, 2–8-locular, ovules 1 or 2 per locule, entire or 4-lobed, style terminal, stigma simple or bifid. Fruit a drupe or capsule, sometimes breaking up into nutlets. Seeds 1–4, usually without endosperm.
屬
About 90 genera and 2,000 species, chiefly in tropical and subtropical; about 10 genera in Taiwan, three of the genera introduced and naturalized.
參考文獻
Vitex 牡荊屬
作者
YANG Yuen-Po , LU Sheng-You and CHEN Tien-Tsai
型態特徵
Trees or shrubs, rarely woody vines; stems glabrous or hairy. Leaves usually palmately compound or sometimes simple, petiolate, leaflets entire or dentate. Inflorescence cymose, terminal or axillary. Flowers mostly purplish blue; calyx usually campanulate, usually truncate or 5-dentate; corolla 2-lipped, lower lip 3-lobed, upper lip 2-lobed; stamens 4, didynamous, inserted in corolla tube, anthers 2-celled, attached near apex; ovary 2–4-locular, ovules 1 or 2 per locule, style filiform, stigma shortly bifid. Fruit a drupe, enclosed by enlarged persistent calyx, globose or ovoid, fleshy, 4-locular and 4 seeded; seeds obovoid or oblong, endosperm absent.
