Zizania palustris var. interior (Fassett) Dore
Family: Poaceae
northern wild rice
[Zizania aquatica var. interior L.,  more]
Zizania palustris var. interior image
from USDA Plants website  
Etymology: Zizania: from adaptation of zizanion for an ancient name of some wild grains
Plants: erect/floating annual, aquatic, emergent grass
Leaves: first leaves float; later emerge, wide, flat
Flowers: 5-parted, each female spikelet has 1 flower with 3-ribbed, shiny firm lemma; inflorescence spikelets, female at top
Habitat: wet; in water to 40" deep, rivers, lakes; in silty, mucky soil
Conservation Status: Native
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