ADA PYGMAEA (ORCHIDACEAE: ONCIDIINAE): A NEW SPECIES FROM ECUADOR

摘要

A new species of the genus Ada from southeastern Ecuador is described and illustrated. Ada pygmaea apparently has no close relatives within the genus, and both its plant architecture and floral morphology are somewhat anomalous within Ada. The new taxon is compared with A. brachypus, which it resembles in the small size of the plant and the flowers, the brown tepals and the white, almost immaculate lip. Ada pygmaea can be easily distinguished from A. brachypus, however, by its rhizomatose, repent-ascending habit, the absence of pseudobulbs, the coriaceous leaves, the 1- to 2-flowered inflorescences, the distinctly smaller flowers, the ovate, truncate, ecallose lip, and the column inflated-convex at the base and provided with a well-developed, petaloid, erose-lacerate clinandrium.