Family Code: MARSIL Genus Code: PILUL Genus CN: pillwort Genus Authority: L. Genus Summary: A genus of 2-6 species, nearly cosmopolitan. Genus Identification: Identification 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." Genus References: Nagalingum, Nowak, & Pryer (2008); Dennis & Webb (1981); Kramer in Kramer & Green (1990). Last Updated: 2019-11-29 Publish: 1