Isoetaceae
spiny-spored quillwort
Isoetes echinospora Durieu
Isoetes echinospora Durieu, commonly called spiny quillwort, is a lycophyte species native to North America and parts of Europe.
Nuttall's quillwort
Isoetes nuttallii A.Braun ex Engelm.
Isoetes nuttallii, or Nuttall's quillwort, is a lycopod quillwort native to wet habitats of western North America.
lake quillwort
Isoetes lacustris L.
Isoetes lacustris L. is a boreal quillwort native to regions on both sides of the northern Atlantic Ocean.
Blackfoot quillwort
Isoetes melanopoda Gay & Durieu
Isoetes melanopoda is a short-lived quillwort native to the US, where it is endangered in six states.
Butler's quillwort
Isoetes butleri Engelm.
Isoetes butleri, or limestone quillwort, is an inconspicuous lycophyte native to eastern United States, growing on seasonally wet alkaline limestone soils.
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