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42 quillwort order species
Isoetes valida
Isoetes delilei
Isoetes tennesseensis
Isoetes texana
Isoetes mississippiensis
Isoetes appalachiana
Isoetes setacea
Isoetes boomii
Isoetes graniticola
Isoetes mattaponica
Isoetes ekmanii
Isoetes flaccida
Isoetes georgiana
Isoetes hawaiiensis
Isoetes hyemalis
Isoetes butleri
Isoetes microvela
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