Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: new records, re-evaluation of P. ruprechtii, and two new species, P. palmeri and P. wendtii Author Soreng, Robert J. Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA Author Peterson, Paul M. Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA text PhytoKeys 2012 2012-08-06 15 1 104 http://dx.doi.org/10.3897/phytokeys.15.3084 journal article http://dx.doi.org/10.3897/phytokeys.15.3084 1314-2003-15-1 FF9AC356FFDAFB26FF95FFE3FFA1520C 576134 Poa Papillopoa Soreng subsect. nov. Type. Poa mulleri Swallen. Diagnosis. From other infrageneric taxa of Poa , differing by the 5-7-veined upper glumes, and long cells of the leaf blade abaxial epidermis with a central line of 6-9 papillae per cell.