找植物
找標本
電子書

Apocynaceae

夾竹桃科

特徵描述
屬列表
標本列表

特徵描述

作者

LI, Huei-Lin and HUANG, Tseng-Chieng

型態特徵

Woody vines, shrubs or small trees, with milky latex. Leaves opposite, verticillate or rarely alternate, entire, estipulate. Flowers bisexual, regular, in terminal or axillary cymes; calyx 5-lobed, lobes imbricate, persistent. Corolla rotate to salverform, lobes (4–)5, convolute in bud, rarely valvate; stamens (4–)5, adnate to corolla tube, filaments usually short, anthers usually sagittate and acute, connivent, connectives sometimes adhering to stigma, cells sometimes extending into a spur below; ovary 2-carpellate, superior, carpels distinct at base, united at base of style, many-ovuled, with an annular cup-shaped or lobed disc at base, style 1, simple or divided. Fruit usually of 2 distinct follicles, sometimes berry-like or drupe-like; seeds various, usually compressed or with a tuft of hairs (coma); endosperm scanty, sometimes wanting.

About 170 genera and over 2,000 species, chiefly in tropical and subtropical areas; 10 genera and 18 species in Taiwan.

參考文獻

Parsonsia 爬森藤屬

作者

LI, Huei-Lin and HUANG, Tseng-Chieng

型態特徵

Twining shrubs. Leaves opposite. Flowers small, white, in terminal or axillary dichotomous cymes; calyx 5-lobed; corolla salverform, 5-lobed, tubes cylindric, throat naked, lobes overlapping to right; anthers exserted, connivent over and adhering to stigma, cells spurred below; disc 5 lobed; ovary 2-celled, style enlarged at top, stigma columnar, cells many-ovuled. Fruit cylindric; seeds comose; endosperm scanty.

參考文獻

標本列表