Aucuba 桃葉珊瑚屬

作者

LI, HUI-LIN and YANG, KUOH-CHENG

型態特徵

Trees, shrubs or suffrutescent subshrubs. Leaves opposite or rarely alternate, simple, usually deciduous, petioled, estipulate. Flowers small, bisexual or unisexual, actinomorphic, in cymes or panicles or head, sometimes with showy foliaceous bracts. Sepals 4–5, distinct, valvate. Petals 4(–5) distinct mostly valate. Stamens of same number as petals and alternate with them, distinct; anthers 2-celled, basifixed or dorsifixed. Ovary inferior, 2–4- or rarely 1-celled; placentation usually axile; ovule 1 in each cell, pendulous, anatropous; style 1 or several, arising from an epigynous ring or disc, the stigmas as many as styles and subcapitate. Fruit a drupe, sometimes a berry or rarely a syncarp. Seeds with small embryo in copious endosperm.

屬

About 13 genera, widely distributed in the tropical and temperate regions of the world; four in Taiwan.

參考文獻

LI, HUI-LIN and YANG, KUOH-CHENG, Flora of Taiwan, second edition 3: 979. . (Fl. Taiwan 2nd edit.)

Aucuba 桃葉珊瑚屬

作者

LI, HUI-LIN and YANG, KUOH-CHENG

型態特徵

Glabrous branching shrubs, evergreen. Leaves opposite, petioled, ovate or lanceolate, obtusely serrate, leathery, shining, turning black in drying. Flowers small, dioecious, pseudo-axillary panicles; pedicels jointed and bracteolate. Staminate flowers: calyx small, 4-toothed; petals ovate or lanceolate, valvate; stamens 4; disc quadrangular, fleshy; no rudiment of an ovary. Pistillate flowers: calyx ovoid, the limb 4-toothed; petals as in the staminate; no rudiments of stamens; ovary 1¬celled; disc fleshy; style short, thick, the stigma capitate; ovule solitary, pendulous. Berry ellipsoid, crowned with the calyx teeth and style; seed oblong; endosperm copious, embryo minute.

Species over ten, natives of the Himalayas and eastern Asia; two or three in Taiwan.