An amaizing species of Hildewintera (Cactaceae) characters and systematic position

A recientely described second species of Hildewintera, H. colademonomis , is critically analized. A detailed description is given, and the systematic position and nomencature of the species are discussed. Bout species of Hildewintera are mainly distinguished from Cleistocactus by the double corolla, the difference sculpturing of the seed-testa and the pendulous stems with spines directed donwards. H. colademononis is characterized by a flower woth an axial spur, a character newer previously reported for the cactaceae. Notes onclimate, affinities, nomenclature and taxonomy are also presented.Fil: Kiesling, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Metzing, Detlev. Universittit Oldenbllrg; Alemani