Key to Elodea

View taxon page for Elodea

(For a list of species in Elodea, use the above link.)

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

1. Mid-stem leaves 2–3 per 

node 

Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise.

, tip rounded or 

obtuse 

Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle.

; staminate inflorescence 

bract 

Reduced, leaf- or scale-like structure subtending a branch, cone scale, peduncle, pedicel, or flower.

10–42 mm ..... E. bifoliata

1' Mid-stem leaves 3(4) per node, tip obtuse, abruptly pointed, or 

acute 

Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.

; staminate inflorescence bract 2.2–13.5 mm

2. Leaves 2–5 mm wide, tip obtuse to abruptly pointed; staminate flowers deciduous in late 

bud 

1. An incompletely developed, more or less embryonic shoot, usually covered with bud scales. 2. An unopened flower, often protected by sepals.

or when flowers open, petals ± 5 mm; pistillate sepals ± 2–3 mm ..... E. canadensis

2' Leaves 0.3–2 mm wide, tip acute; staminate flowers deciduous in bud, petals generally 0 or ± 0.5 mm; pistillate sepals ± 1 mm ..... E. nuttallii

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