Key to Alismataceae

View taxon page for Alismataceae

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Pistils, fruits ± fused at base; petals cut; flowers 

bisexual 

Both male and female reproductive parts occurring and functional in the same plant or structure (e.g., flower, spikelet, inflorescence).

; stamens 6 ..... DAMASONIUM

1' Pistils, fruits free, in 1 whorl on margin of ± flat receptacle or spiralled on convex receptacle; petals ± cut to generally 

entire 

Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).

; flowers bisexual or unisexual; stamens 0, generally 6, or 7–30

2. Pistils, fruits in 1 whorl on margin of ± flat receptacle; stamens generally 6; flowers bisexual ..... ALISMA

2' Pistils, fruits spiralled on convex receptacle; stamens 0 or 7–30; flowers bisexual or unisexual

3. Flowers bisexual; fruit cluster bur-like, beaks terminal, 0.6–1.3 mm ..... ECHINODORUS

3' Fls, or at least proximal, unisexual; fruit cluster not bur-like, beaks terminal, 0.1–0.4 mm, or lateral, 0.1–2 mm ..... SAGITTARIA

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