Pilularia Linnaeus. Pillwort.
A genus of about 5 species, nearly cosmopolitan.
ID notes:Pilularia lacks a leaf-blade, the 1-8 cm long petiole is narrowly winged, and looks a bit like an Isoetes or Juncus leaf. In vegetative condition, it may be recognized as a "fern" by the typical coiled ("fiddlehead") development of young leaves. The primary rhizome produces individual "fronds" at nodes, a short rhizome branch at each node also produces "fronds."
Ref: Dennis & Webb (1981); Johnson (1993c) In Flora of North America Editorial Committee (1993b); Kramer & Green (1990); Nagalingum, Nowak, & Pryer (2008). Show full citations.
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© Keith Bradley | Pilularia americana | Original Image ⭷
© Alan Cressler: Pilularia americana, Hood Road Flatrock, Walton County, Georgia 3 by Alan Cressler | Pilularia americana source | Original Image ⭷Feedback
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