All Floras      Advanced Search
FNA Vol. 2 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 2 | Isoëtaceae | Isoëtes

Isoëtes georgiana Luebke, Amer. Fern. J. 82: 24. 1992.

Georgia quillwort

Plants aquatic, emergent. Rootstock nearly globose, 2-lobed. Leaves deciduous, olive green, pale toward base, spirally arranged, to 40 cm., pliant, gradually tapering toward tip. Velum covering less that 3/4 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 450--650 μm diam., cristate to reticulate with broad, jagged ridges; girdle obscure. Microspores light brown in mass, 23--33 μm, papillose. 2n = 66.

Spores mature late summer. Creeks; of conservation concern; Ga.

Isoëtes georgiana is known only from Worth County, Georgia. An early collection from this locality was reported by B. M. Boom (1982) to be I. engelmannii x piedmontana, but the broad velum and bold texture of the megaspores suggest a possible involvement of I. flaccida.


Related Objects Image Gallery 
  • Illustration
  • Illustration
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |