特徵描述
作者
YANG, Yuen-Po
型態特徵
Erect, glabrous, annual or perennial marsh or aquatic herbs. Leaves radical, linear, lanceolate, sagittate, broadly ellipsoid to deltoid, or reduced to phyllodes, petiole sheathing, elongate, nerves converging towards apex and connected by transverse veinlets. Inflorescences racemes or panicles, occasionally umbels. Flowers often whorled at nodes of inflorescence rachis, actinomorphic, unisexual, bisexual or polygamous, bracteate, pedicellate; sepals 3, green, persistent; petals 3, white, fugacious, or sometimes persistent; stamen 3-numerous, anthers 2-locular, extrorse; gynoecium of numerous free carpels in a single whorl or spirally arranged on receptacle; ovules 1-several per carpel; style persistent. Fruit a cluster or whorl of laterally compressed achenes; achene with a U-shaped embryo, endosperm absent.
屬
Ninety six species in 11 genera, cosmopolitan, especially abundant in the temperate and tropical regions of the northern hemisphere; three genera with five species in Taiwan.
參考文獻
Alisma 澤瀉屬
作者
YANG, Yuen-Po
型態特徵
Glabrous perennial or annual herbs. Leaves long petiolate; blade lanceolate to narrowly oblong, entire, nerves longitudinal, transversely connected by veinlets. Inflorescence paniculate; flowers bisexual; stamens 6; carpels in a single whorl on flat receptacle. Achenes with 2 or 3 dorsal ribs.
參考文獻
種列表
- Alisma canaliculatum 澤瀉
- Alisma gramineum ssp. wahlenbergii
- Alisma parnassifolium 澤苔草
- Alisma plantago
- Alisma plantago var. latifolia
- Alisma plantago var. graminifolia
- Alisma plantago var. angustifolium
- Alisma plantago-aquatica 澤瀉
- Alisma ranunculoides
- Alisma sagittaria
- Alisma stenophyllum
- Alisma subcordatum
- Alisma wahlenbergii
