Poa subg. Andinae Nicora (Poaceae, tribe Poeae) is raised to the rank of genus, here renamed as Nicoraepoa Soreng & L. J. Gillespie. Six specific and one infraspecific combinations are made: N. andina (Trin.) Soreng & L. J. Gillespie, N. chonotica (Phil.) Soreng & L. J. Gillespie, N. erinacea (Speg.) Soreng & L. J. Gillespie, N. pugionifolia (Speg.) Soreng & L. J. Gillespie, N. robusta (Steud.) Soreng & L. J. Gillespie, N. subenervis (Hack.) Soreng & L. J. Gillespie, and N. subenervis subsp. spegazziniana (Nicora) Soreng & L. J. Gillespie. Lectotypes are designated for N. pugionifolia and N. subenervis. Taxonomy and nomenclature of similar Southern Hemisphere island species of Poa L. and other related genera are discussed. Poa sect. Parodiochloa (C. E. Hubb.) Soreng is emended to include, in addition to P. flabellata (Lam.) Raspail, P. cookii (Hook. f.) Hook. f., P. foliosa (Hook. f.) Hook. f., P. hamiltoni Kirk, P. ramosissima Hook. f., and P. tennantiana Petrie. The one species of Tzvelevia E. B. Alexeev is reunited with Poa, and the genus is transferred to Poa sect. Tzvelevia (E. B. Alexeev) Soreng & L. J. Gillespie. Morphological and anatomical characteristics of Nicoraepoa, Poa sect. Parodiochloa, and similar genera in Poinae are compared. Leaf blade morphology and anatomy were found to be particularly useful in characterizing Nicoraepoa and related taxa. A key is provided to distinguish Nicoraepoa, Poa sect. Parodiochloa, and morphologically similar perennial genera of Poinae.