Physeterostemon (Melastomataceae): a new genus and two new species from the Bahian Atlantic Forest, Brazil

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Abstract:

A new genus, Physeterostemon, with two new species, P. fiaschii and P. jardimii, is described from southern Bahian Atlantic forest of Brazil. The genus can be distinguished from all other Melastomataceae by its 6-merous and diplostemonous flowers, toothed and persistent calyx, inferior ovary and dry, capsular fruits. The androecium consists of stamens that are slightly unequal in size with connectives that are unappendaged or minutely ventrally bituberculate and not prolonged below the thecae but dorsally and apically thickened; the anthers are oblong and rounded apically in ventral view, slightly projecting backwards over the connective in lateral view, but with a single ventral pore.

Keywords: ATLANTIC FOREST; BAHIA; BRAZIL; MELASTOMATACEAE; NEW GENUS; PHYSETEROSTEMON; TAXONOMY

Document Type: Research Article

Affiliations: 1: Universidade Federal do Paraná, Departamento de Botânica. Campus do Centro Politécnico, 81531-970, Curitiba, Paraná, Brazil 2: Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, and Herbarium CEPEC, CEPLAC, 45600-000, Ilhéus, Bahia, Brazil

Publication date: November 1, 2006

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