Isoetes piedmontana (N.E. Pfeiffer) C.F. Reed. Hab: In seepage on or near granitic flatrocks, rarely on sandstone (Altamaha grit and Ridge and Valley). Dist: VA south and west to ec. and n. AL; material in c. TX has been placed here, but is likely to warrant description as a separate taxon.
Origin/Endemic status: Native
Synonymy: = K1, K3, Va, Musselman (2001), Singhurst et al (2011); < Isoetes melanopoda Gay & Durieu ex Durieu – RAB; < Isoetes virginica N.Pfeiff. – C, F, FNA2, G