Najas marina L.  
Family: Hydrocharitaceae
alkaline water-nymph, spiny naiad
[Najas gracilis (Morong) Small, Najas major All., Najas major var. angustifolia All., Najas marina var. recurvata L.]
Najas marina image
Andrew Hipp  
Etymology: Najas: from Greek Naias, a water nymph
Plants: submerged annual, dioecious aquatic; stems very long, many branches, 0.5-4mm thick, often prickly; slight rootstock
Leaves: very narrow, to 2"L x 2W, coarsely toothed edges, lower side of mid-vein prickly
Flowers: tiny, from leaf axis
Fruits: red-brown, paper-thin walls, irregular pits
Habitat: wet; clear 3' or more deep-water alkaline water
Conservation Status: Introduced - naturalized
Najas marina image
Kurt Stüber  
Najas marina image
Paul Skawinski  
Najas marina image
Paul Skawinski  
Najas marina image
Andrew Hipp  
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