Abstract
Stipa ×brozhiana M. Nobis nothosp. nov. (Poaceae) is described and illustrated. The taxon belongs to sect. Smirnovia Tzvel. and originated from the hybridization of species belonging to sect. Smirnovia and Barbatae Junge. Stipa ×brozhiana is morphologically close to Stipa lipskyi Roshev., but is easily distinguished by its much shorter hairs on the seta, thinner, uni‐ or indistinctly bigeniculate awns, differently shaped callus and longer ligules of vegetative shoots. Characters distinguishing S. ×brozhiana from the parental species and other similar hybrid taxa belonging to sect. Smirnovia and occurring in the Pamir Alai Mts are discussed. In addition, the taxonomical status of S. ×tzvelevii Ikonn. pro sp., another taxon that has originated from hybridization between species belonging to sect. Smirnovia and Barbatae, is discussed. The taxon was originally described as a distinct species, but is now considered to be the hybrid S. caucasica×S. orientalis. The main characters distinguishing S. ×tzvelevii from parental species are given.
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