104 RypBERG: STUDIES ON THE ROCKY MOUNTAIN FLORA 
S. Wats.) in eastern Utah, Eragrostis lutescens Scribn. and E. 
hypnoides Nees in Idaho, E. secundiflora Presl in Colorado, and E. 
neomexicana Vasey in southern Utah. Briza maxima L. has be- 
come introduced in Colorado. . 
Poa Multnomae Piper and P. ampla Merrill have been collected 
in Montana since 1909. Poa flava L. is not a Poa at all, as shown 
by Professor A. S. Hitchcock, and the name to be used for P. 
serotina Ehrh. is P. triflora Gilib. Poa laxa Haenke is not found 
in the Rocky Mountains, and what has been masquerading under 
that name is P. alpicola Nash. Poa paddensis Piper is an older 
name for P. subpurpurea Rydb., both being based on P. purpuras- 
cens Vasey. In the New Manual no reason is given why P. 
Buckleyana Nash, published in 1895, should be used instead of P. 
Sandbergii Vasey of 1893. They maybe thesame. P. Buckleyana 
Nash was a substitute for the untenable P. tenuifolia Buckl., while 
P. Sandbergii was described independently. I have not seen 
Buckley’s type, but it is supposed to have been based upon the 
manuscript P. tenutfolia Nutt. Dr. A. Gray accused Buckley of 
having pilfered the species from Nuttall. There is in the her- 
barium of the New York Botanical Garden a specimen named by 
Nuttall P. tenuifolia, and this specimen belongs to P. Sandbergit. 
What has usually passed under the names P. tenutfolia and P. 
Buckleyana is different, and I think represents a distinct although 
closely related species. The grass common in Wyoming and Colo- 
rado belongs to this and not to the typical P. Sandbergiit, which 
ranges only west of the continental divide. 
Although Poa pseudopratensis Scribn. & Rydb. resembles the 
common bluegrass in habit it is entirely distinct from it and more 
closely related to P. arida Vasey. Like that species it lacks the 
cobweb at the base of the floral glumes altogether, while P. 
pratensis has the best developed cobweb of all our species. Like- 
wise P. phoenicea Rydb., also cited as a synonym under P. praten- 
sis in the New Manual, has no cobweb and belongs in another — 
section of the genus. I am inclined to think that P. phoenicea 
Rydb. is the same as the original P. Grayana Vasey, while P. 
Grayana of my Flora of Colorado is a large-flowered P. Patter- 
sonit or a closely related species. 
Poa crocata Michx. is the same as P. caesia strictior. In the 
