Phylogeny and taxonomic synopsis of PoasubgenusPseudopoa (including Eremopoa and Lindbergella) (Poaceae, Poeae, Poinae).

ABSTRACT

Eremopoa is a small genus of annual grasses distributed from Egypt to western China. Phylogenetic analyses of plastid and nuclear ribosomal DNA show that Eremopoa species, together with the monotypic genus Lindbergella and a single species of Poa (P.speluncarum), are nested within the genus Poa, in a clade that we accept as Poasubg.Pseudopoa. Here we accept seven species, four subspecies and four varieties in Poasubg.Pseudopoa. Five new combinations are made Poaattalica, P.diaphora var. alpina, P.diaphora var. songarica, P.nephelochloides and P.persicasubsp.multiradiata; P.millii is proposed as a replacement name for E.capillaris; and Poa sections Lindbergella and Speluncarae are proposed. We provide a diagnosis for Poasubg.Pseudopoa, synonymy for and a key to the taxa. Eight lectotypes are designated Eragrostisbarbeyi Post, Eremopoanephelochloides Roshev., Glyceriataurica Steud., Nephelochloatripolitana Boiss. & Blanche, Poacilicensis Hance, Poaparadoxa Kar. & Kir., Poapersicavar.alpina Boiss and Poapersicasubsp.cypria Sam. Eremopoamedica is re-identified as a species of Puccinellia.