World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew

Poa pratensis subsp. rigens (Hartm.) Tzvelev, Novosti Sist. Vyssh. Rast. 9: 47 (1972).
Original Compiler:	W.D.Clayton, R.Govaerts, K.T.Harman, H.Williamson & M.Vorontsova
This name is not Accepted by:	USDA, NRCS (2005- continuously updated). Natural Resources Conservation Services Plant Database. http://plants.usda.gov/cgi_bin/topics.cgi?earl=checklist.html. [as Poa pratensis subsp. irrigata] Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database. The Board of Trustees of the Royal Botanic Gardens, Kew. [as Poa pratensis] Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford. [as Poa pratensis subsp. alpigena]

Poa pratensis subsp. rigens (Hartm.) Tzvelev, Novosti Sist. Vyssh. Rast. 9: 47 (1972).

Original Compiler:

W.D.Clayton, R.Govaerts, K.T.Harman, H.Williamson & M.Vorontsova

This name is not Accepted by:

USDA, NRCS (2005- continuously updated). Natural Resources Conservation Services Plant Database. http://plants.usda.gov/cgi_bin/topics.cgi?earl=checklist.html. [as Poa pratensis subsp. irrigata]

Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database. The Board of Trustees of the Royal Botanic Gardens, Kew. [as Poa pratensis]

Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford. [as Poa pratensis subsp. alpigena]