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Isoetes butleri Engelmann. Common name: Butler's Quillwort. Phenology: May-Jun. Habitat: Seepage areas on calcareous glades, sometimes also in seepage on non-calcareous rocks. Distribution: KY, IL, MO and e. KS south to e. TX and c. and nc. TX; disjunct eastwards in sc. KY, c. TN, n. GA and n. and c. AL.

Origin/Endemic status: Native

Taxonomy Comments: A diploid species (2n=22), genotype=BB.

Other Comments: See Taylor, O'Kennon, & Rehman (2012) for detailed information on this species in Texas.

Synonymy ⓘ: = Ar, C, ETx1, F, FNA2, G, GrPl, Il, K4, Mo1, NS, POWO, S13, Sf, Tn, TxFerns, Musselman (2001), Singhurst et al (2011). Basionym: Isoetes butleri Engelm. 1878

Links to other floras: = Isoetes butleri - FNA2

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: FACW
  • Great Plains: OBL
  • Midwest: OBL

Heliophily ⓘ: 8

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image of plant© Alan Cressler: Isoetes butleri, Limestone Glade, Chickamauga and Chattanooga National Battlefield Park, Catoosa County, Georgia 3 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Isoetes butleri, Quillwort Glade, Kathy Stiles Freeland Bibb County Glades Preserve, The Nature Conservancy, Bibb County, Alabama 2 by Alan Cressler source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷

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Horticultural Information

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