Illustrator: Laurie Klingensmith

Copyright: Flora of North America Association

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.

Habitat: Creeks

Distribution

• Generated Map
• Legacy Map

Ga.

Discussion

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.

Of conservation concern.

Selected References

None.

Lower Taxa

None.