ARTHUR: New SPECIES OF UREDINEAE 229 
On leaves and sheaths of Sporobolus cuspida‘us (Torr.) Wood, 
Spirit Lake, Iowa, March, 1884 (/. C. Arthur), which is taken as 
the type, Aberdeen, S. D., Sept. 7, 1897 (David Griffiths), and 
Callaway, Neb., Oct. 2, 1901 (J. M. Bates, no. 2028). Also on 
Sporobolus utilus Torr., Las Vegas, N. M., Oct. 5, 1901 (Z. D. A. 
Cockerell, comm. F. S. Earle), and Cochise, Ariz., Oct., 1900 
(David Griffiths), and on Sporobolus asperifolius (N. & M.) Thurb., 
Billings, Mont., Aug., 1898 (Wilhams & Griffiths, comm. David 
Griffiths), 
A rather common species in the semi-arid parts of the West, 
heretofore confused with other species of Puccinia on Sporobolus, 
more particularly with P. sporoboli Arth. The teleutospores are 
much shorter and more rounded than in 2. cryptandri E. & B. and 
P.vilfae A. & H., and much shorter, broader, and the two cells more 
nearly equal in size than in P. sporoboli Arth. The uredospores 
of the four species are even more unlike, and are readily dis- 
tinguished. In P. sporoboli they are echinulate, pores more than 
4 and scattered ; in P. cryptandri they are echinulate with 4 equa- 
torial pores ; in P. vilfae they are tuberculate, with wall colorless, 
apex thickened and pores obscure ; and in P. fos¢a they are tuber- 
culate with wall colored, pores more than 4 and scattered. The 
form on S, asperifolius is somewhat divergent, but not markedly 
So in the specimen examined. The host of the two specimens 
recorded as on S. x¢ilus is sometimes called S. repens Presl., but it is 
Possible that neither name is correctly used for this grass, a very 
fommon form in the Southwest. 
Puccinia tosta luxurians var. nov. 
I. Uredospores slightly larger than in the species,more strongly 
tuberculate, almost echinulate, wall thicker, about 2 4. 
ve III. Teleutosori elongated, in part linear with acute ends ; teleu- 
Ospores larger, oblong, 27-32 X 43-55 4. 
On Sporobolus airoides Torr., Andrews, Ore., Aug., 1901 
(Griffiths & Morris, comm. David Griffiths), which is taken as 
ae isd type, and on same host, Billings, Mont., Sept., 1898 (Wil- 
“ hams & Griffiths, comm. David Griffiths). -In both gross and 
_ Minute characters this form on S. airoides differs somewhat from 
Ree ‘s Previously described species, but for the most part the differ- 
