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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

Lomatogonium 肋柱花屬

作者

Chen & Wang.

型態特徵

Herbs annual or perennial. Roots fibrous or woody. Stems prostrate, ascending, erect, striated or angled, branched or simple. Inflorescences few- to many-flowered, terminal and axillary cymes, sometimes flowers solitary and terminal. Flowers (4-or) 5-(or 10-) merous; pedicel usually longer than flower. Calyx and corolla rotate, lobed nearly to base or with a distinct tube. Corolla dextrorse in flower bud. Nectaries 2, at base of corolla lobes. Stamens inserted at summit of corolla tube; filaments somewhat flattened; anthers usually blue, shorter than or rarely as long as filaments. Ovary ensiform, cylindric, or ovoidellipsoid; style absent; stigma lobes decurrent along carpel sutures. Capsule 2-valved, seeds many. Seed coat almost smooth.

參考文獻

  • Chen & Wang., Botanical bulletin of Academia Sinica 41: 323-326. 2007.  (Bot. Bull. Acad. Sin.)

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