特徵描述
作者
OHASHI, HIROYOSHI Aralia by OHASHI, HIROYOSHI and LU, SHENG-YOU
型態特徵
Shrubs, trees, or rarely perennial herbs, often prickly, sometimes scandent. Leaves alternate, petiolate, simple or compound; stipules present or absent. Inflorescence terminal, usually umbels or heads, sometimes racemose or spicate, the umbels or heads solitary, racemose, corymbose, paniculate or umbellate. Bracts usually small and deciduous. Flowers regular, mostly small, bisexual, polygamous or dioecious. Calyx-tube adnate to the ovary, lobes small or reduced to a rim, or rarely absent. Petals 5–10, valvate or imbricate, usually free. Stamens 5–10, alternate with and inserted on the petals at the edge of the disc, the anthers versatile, introrse, the locules 2, longitudinally dehiscent. Disc epigynous, fleshy, annular. Ovary inferior or half inferior, 1–15 ¬celled, the styles as many as the cells, free or connate; ovules solitary, anatropous. Fruit baccate or drupaceous; seeds solitary in pyrenes, the embryo small, the endosperm uniform or ruminated. X= 11, 12.
屬
About 60 genera and more than 800 species, in the tropical and temperate regions of both hemispheres. Ten genera in Taiwan.
參考文獻
- OHASHI, HIROYOSHI, Flora of Taiwan, second edition 3: 986. 1993. (Fl. Taiwan 2nd edit.)
- Hoo, G. & Tseng, C. J., Fl. Reipub. Popul. Sin. 54: . 1978.
- Philipson, W. R., Fl. Malesiana 9: 1-105. 1979.
Hedera 常春藤屬
作者
OHASHI, HIROYOSHI Aralia by OHASHI, HIROYOSHI and LU, SHENG-YOU
型態特徵
Evergreen shrubs, climbing by aerial rootlets, the young growths and inflorescences scaly or stellate-pubescent. Leaves alternate, petiolate, simple, coarsely lobed or dentate or unlobed on flowering stems; stipules wanting. Flowers in solitary or racemosely arranged umbels, the bracts very small; pedicels not articulate under the calyx, calyx-margin subentire or 5-dentate; petals 5, valvate; stamens 5, the anthers oval; ovary 5-celled; styles connate into a short column. Fruit globose, berry-like, 5-celled; seeds ovoid, the endosperm ruminate.
