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Gentianaceae

龍膽科

特徵描述
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特徵描述

作者

WANG, Jenn-Che, CHEN, Chih-Hsiung, LU, Chang-Tze and CHEN, Ya-Chi

型態特徵

Herbs, annual, biennial or perennial. Stems ascending, erect or twining. Leaves opposite, less often whorled, simple; stipules absent. Inflorescences simple or complex Cymess, often a thyrse, sometimes 1-flowered. Flowers bisexual, rarely plants polygamous, 4- or 5-merous. Calyx tubular. Corolla tubular, obconic, salverform, campanulate or rotate; lobes contorted, sometimes with extensions of corolla tube (plicae) between corolla lobes. Stamens inserted on corolla tube, alternate with lobes; anthers 2-locular. Nectaries absent or attached to corolla (maculas) or ovary base. Ovaries superior, 1-locular, rarely 2-locular, with parietal placentae. Fruit a 2-valved Capsule, rarely a berry. Seeds many, rarely few, small.

About 80 genera and 700 species, worldwide, mostly in temperate to frigid regions. Five genera and 26 taxa in Taiwan, of which 20 taxa are endemic.

參考文獻

Tripterospermum 肺形草屬

作者

WANG, Jenn-Che and CHEN, Ya-Chi

型態特徵

Perennial scandent or climbing herbs. Stems slender, elongated and twining or creeping. Leaves opposite, usually 3-nerved, petiolate. Inflorescences axillary and terminal, 1-flowered or few-flowered Cymess. Flowers 5-merous, usually with small foliaceous bracts at base. Calyx tube usually 5 keeled costae continuous with calyx lobes, 5-cleft. Corolla tubular to tubular-campanulate, 5-lobed, with plicae in sinuses of lobes. Stamens inserted in lower part of corolla tube, unequal, recurved apically. Nectaries forming a collar-like disc surrounding base of ovary. Ovary stipitate (gynophore), ellipsoid, 1-locular; styles slender, persistent; stigmas 2, linear, recurved at anthesis. Fruit a berry or Capsule, often spindle-shaped, subglobose to ellipsoid. Seeds triquetrous, often compressed, winged or wingless.

參考文獻

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