Piptatherum fumeauxii (Poaceae), a new species from Algeria

Piptatherum fumeauxii F.M. Vazquez, Chamboul. & C. Chatel. sp. nova (Poaceae) is described from the Hoggar Mountains in central Sahara, Algeria. It morphologically resembles P. coerulescens and P. holciforme var. longiglume, but differs from them by the narrow panicles, shorter spikelets and smaller floral parts. The presence of P. holciforme in Libya is confirmed, while it is excluded from the flora of Morocco. Lectotypes are designated for the names Milium coerulescens Desf. and P. holciforme subsp. longiglume Hausskn., and the latter is recognized as P. holciforme subsp. longiglume (Hausskn.) Freitag ex F.M. Vazquez & F. Marquez comb. et stat. nov.