Carex michoacana, a new species of Carex section Ovales (Cyperaceae) from Mexico
AbstractCarex michoacana is described as new from Michoacan, Mexico. It is most similar morphologically to C. tetrastachya from the southern United States, but differs in having smaller perigynia with narrower achenes. It differs from all other species in the Carex brevior group with similarly large perigynia in having staminate and pistillate scales with a scabrous awn formed by the excurrent midvein and perigynia nerveless over the achene adaxially. From a molecular phylogenetic standpoint, the position of this species is equivocal, but the more conclusive of the two nuclear ribosomal DNA datasets utilized supports the morphological evidence suggesting that it is a member of the Carex brevior group.The names C. tetrastachya and C. brittoniana are typified.
Volume, Page Number25, 225-230