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Isoetes riparia Engelmann ex A. Braun var. riparia . Shore Quillwort. Hab: Shores. Dist: Isoetes riparia is extirpated from most of its historic localities.

Origin/Endemic status: Endemic

Taxonomy Comments: A tetraploid species (2n=44). Isoetes riparia is believed to be a mid-Atlantic relative of I. septentrionalis.

Synonymy: = K3; < Isoetes riparia Engelm. ex A.Braun – AqW, C, FNA2, K4, Pa, RAB, Tat

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: OBL (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)

Heliophily ?: 8

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