Flora of China
  FOC Vol.23 (2010)              | Family List  Alismataceae  PDF Alisma  PDF   | Link Font:+ Big | - Small
   4. Alisma  Linnaeus Sp. Pl. 1: 342. 1753.
泽泻属   ze xie shu


Herbs, aquatic or of marshes, usually with a tuber. Leaves aerial, floating, or submerged, all basal, petiolate, margin entire. Inflorescences paniculate or occasionally umbellate; branches whorled, each one usually secondarily branched and with bracts at base. Flowers bisexual. Petals usually larger than sepals. Stamens 6. Carpels numerous in a single whorl, free, each with 1 ovule. Achene laterally compressed, 1- or 2-grooved or canaliculate abaxially, with a usually adaxial beak.

About 11 species: temperate and subtropical regions; six species (one endemic) in China.

1Anthers broader than long; style 0.1-0.2 mm; plants slender.6  A. nanum    小泽泻
+Anthers narrower than long; style longer than 0.4 mm; plants ± robust(2)
2(1)Aerial leaves usually elliptic to ovate, base subcordate or truncate(3)
+Aerial leaves lanceolate to broadly lanceolate, base cuneate(4)
3(2)Petals marginally denticulate; carpels regularly arranged; styles 0.7-1.5 mm.1  A. plantago-aquatica    泽泻
+Petals marginally undulate; carpels irregularly arranged; styles ca. 0.5 mm.2  A. orientale    东方泽泻
4(2)Lateral pericarp thin, translucent; styles substraight; anthers 1-1.2 mm.3  A. lanceolatum    膜果泽泻
+Lateral pericarp thickish, opaque; styles recurved; anthers 0.5-0.8 mm(5)
5(4)Leaves ± falcate; achenes abaxially 1-canaliculate; styles not cirriform-recurved.5  A. canaliculatum    窄叶泽泻
+Leaves not falcate; achenes abaxially 1- or 2-grooved; styles cirriform-recurved.4  A. gramineum    草泽泻
   Lower Taxon
  • Alisma canaliculatum  A. Braun & C. D. Bouché  窄叶泽泻
  • Alisma gramineum  Lejeune  草泽泻
  • Alisma orientale  (Samuelsson) Juzepczuk in Komarov  东方泽泻
  • Alisma plantago-aquatica  Linnaeus  泽泻
  • Alisma lanceolatum  Withering  膜果泽泻
  • Alisma nanum  D. F. Cui  小泽泻