Notas sobre los géneros Poa y Puccinellia (Gramineae)

Resumen

Notes on Poa and Puccinellia (Gramineae). Two new taxa of the genus Poa, P. parviceps Hack. var. jujuyensis Parodi ex Nicora var. nov. and P. ragonesei Nicora sp. nov. for Salta and Jujuy (Argentina), are described and illustrated. The geographical distribution and the differences with related species are included. Poa taltalensis Pilg. is considered as Puccinellia frigida (Phil.) l. M. Johnst. and synonymy is given. A key for the extrapatagonic species of the genus Puccinellia is provided, as well as synonymy and geographical distribution.