The systematic diversity within the esparto grass has produced controversy since the first century AD regarding the varying quality of this natural product as textile material. Investigated herein is Stipa subg. Macrochloa (Kunth) Barreña, D. Rivera, Alcaraz & Obón. Two species, Stipa antiatlantica and S. tenacissima, as well as two subspecies within S. tenacissima are recognized. Stipa kralifii is newly synonymized with S. tenacissima subsp. gabesensis. A dichotomous key is presented for identification of the taxa.
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Vol. 16 • No. 1