A new subspecies of Isoetes coromandelina from northern Australia

Abstract

Isoetes coromandelina L. f. is recorded for the first time for Australia, where it is known only from the northern part. The Australian populations of this species differ from the Indian ones in their megaspore morphology and they are here segregated as a new subspecies, ssp. macrotuberculata. Various vegetative features of I. coromandelina are discussed.