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Elodea

See list of 2 species in this genus
  • 1a. Leaves 1.1–5 mm wide, averaging 2 mm, relatively firm, blunt at the apex, the upper densely crowded and overlapping; staminate flowers elevated on a long, slender, pedicel-
like hypanthium 2–30 cm long [Fig. 129], with a spathe 8–13.5 mm long, with sepals 
3–4 mm long; carpellate flowers with sepals 2.0–3.5 mm long
  • 1b. Leaves 0.9–1.7 (–2.4) mm wide, averaging 1.3 mm, weak, pointed at the apex, the upper 
not densely crowded; staminate flowers sessile, with a spathe 2–4 mm long, with sepals 
ca. 2 mm long; carpellate flowers with sepals 1–1.8 mm long

 Show photos of:   Each photo represents one species in this genus.