Elodea nuttallii (Planch.) H.St.John  
Family: Hydrocharitaceae
free-flowered water-weed, free-flowered waterweed, slender water-weed, slender waterweed
[Anacharis nuttallii Planch., Anacharis occidentalis (Pursh) Vict., Elodea columbiana H.St.John, Elodea minor (Engelm. ex Casp.) Farw., Elodea occidentalis (Pursh) H.St.John, Philotria angustifolia (Muhl.) Britton ex Rydb., Philotria minor (Engelm. ex Casp.) Small, Philotria nuttallii (Planch.) Rydb., Philotria occidentalis (Pursh) House, Udora verticillata var. minor (L.f.) Spreng.]
Elodea nuttallii image
Paul Skawinski  
Etymology: Elodea: Greek elodes for "marsh"
Plants: drooping/tangling, perennial, submersed aquatic, flowers floating; branched stems to 40"; roots shallow
Leaves: linear to lance-like, bright green, stalkless, not firm, edges folded, more or less equally spaced along the stem; 2-3 per whorl
Flowers: white, 3-6-parted (clawed) female flowers small, waxy; male flowers break free at maturity; male and female flowers on separate plants
Habitat: quiet water; in fine sediment soil
Conservation Status: Native
Elodea nuttallii image
Paul Skawinski  
Elodea nuttallii image
from USDA Plants website  
Elodea nuttallii image
Elodea nuttallii image
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