PJB-2019-947
NOTES ON THE GENUS RHETINANTHA (ORCHIDACEAE, MAXILLARIINAE) WITH DESCRIPTIONS OF NEW SPECIES FROM COLOMBIA AND PERU
Dariusz L. Szlachetko
Abstract
Genus Rhetinantha M. A. Blanco has been segregated form Maxillaria sensu lato in 2007. It embraces about 20 species formerly classified in M. acuminata alliance, section Digammae Christenson and its distribution range covers Mexico to Bolivia and Brazil. Representatives of Rhetinantha are subcaespitose to long rhizomatous with often ridged pseudobulbs. Leaves in the number of 1 to 4, occur at the apex of the pseudobulb. Flowers are campanulate in general outline, with rigid, acuminate perianth parts. During the revision of the materials collected in AMES, COL and MO herbariums, we came across specimens which do not fit descriptions of any Rhetinantha species known so far. We propose to describe them below as new species.
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