A new species of Agrostis (Gramineae) in the A-alpina complex

A new species of Agrostis L. (A. barceloi) is described from the northern m ountains of Mallorca (Balearic Islands). The new taxon belongs to sect. Agr ostis and is mainly related to A. alpina Scop. and A. schleicheri Jord. & V erl. on morphological grounds. However, A. barceloi differs from A. alpina by its narrowly-lanceolate inflorescence, with panicle branches erect durin g and after anthesis! non-scabrid leaves, and by smaller lemmas and others. The new species is distinguished from A. schleicheri by the smaller spikel ets, lemma, palea, and anthers. In addition, ii. barceloi is tetraploid (2n = 28), and differs cytologically from the diploid A. alpina (2n = 14) and the hexaploid A. schleicheri (2n = 56). (C) 2000 The Linnean Society of Lon don.