Bristle-like Quillwort, Spiny-spored Quillwort
Isoetes tenella
Synonyms: Isoetes braunii, Isoetes echinospora, Isoetes echinospora var. braunii, Isoetes echinospora var. muricata, Isoetes muricata, Isoetes setacea

What may be spiny-spored quillwort as seen in shallow ponds at Sheep Lake and around the Indian Racetrack in the Indian Heaven Wilderness........August 31, 2014.
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What may be spiny-spored quillwort as seen in shallow ponds at Sheep Lake and around the Indian Racetrack in the Indian Heaven Wilderness........August 31, 2014.

Habitat of spiny-spored quillwort observed in the muddy fringes of
Paul Slichter