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Morphological variation among species of Poa supersect. Homalopoa of the New World. (A) Poa cusickii subsp. purpurascens (clade C); (B) P. unispiculata (clade E); (C) P. bergii (clade D), photo: Daniel Testoni; (D) P. cuspidata; (E) P. aequigluma (clade E); (F) Robert Soreng holding a specimen of P. horridula (clade F); (G) P. lanigera (clade D); clades are given following the results as presented in Supplementary Data Fig. S1.
