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Isoetes appalachiana D.F. Brunton & D.M. Britton. Appalachian Quillwort. Hab: Seepages, small woodland streams, ephemeral wetlands, backwaters. Dist: N. NJ and PA south to ne. FL, s. AL, and ne. MS. See McAvoy (2021) for its occurrence in DE.

Origin/Endemic status: Endemic

Taxonomy Comments: A tetraploid species (2n=44), apparently derived from a northern I. engelmannii entity and I. valida (Hoot, Napier, & Turner 2004), genotype=NNVV. A southern variant is derived from a southern I. engelmannii entity and I. valida, genotype=SSVV. See Brunton & Britton (1997) for additional information.

Synonymy : = Fl1, K1, K4, Tn, Va, WH3, Musselman (2001); = n/a – Tat; < Isoetes engelmannii A.Braun – C, FNA2, Pa, RAB, W, WV; < Isoetes engelmannii A.Braun var. engelmannii – F, Sf; > Isoetes engelmannii A.Braun var. georgiana Engelm.

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL
  • Northcentral & Northeast: OBL

Heliophily : 6

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image of plant© Joey Shaw source | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷

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