The taxonomic status of Hypsela sessiliflora, a threatened NSW endemic, was examined using morphological and molecular data. Although the Type specimen appears to be missing and the protologue is of limited value, available evidence suggests that it is best included within a slightly broadened circumscription of the highly variable Isotoma fluviatilis subsp. fluviatilis.
Author Biography
Eric B Knox
Department of Biology, Indiana University, Jordan Hall 14, 1001 East Third Street, Bloomington, IN 47405
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