221 BOTANICAL GAZETTE. 



This species is respectfully dedicated to its discoverer, Prof. M. E. 

 Jones. He remarks concerning the form on Ferula uiiiltifida, that 

 the Puccinia always attacks the plant later than the .Ecidium and that 

 the fungus soon kills the leaf. I find no good characters by which to 

 separate the form on Peucedaniim simplex from the one on Ferula mul- 

 tifida. In both cases the .Ecidium and the Puccinia occur on the 

 same plant and even on the same leaf. I have therefore united the 

 two as conditions of one species. 



Puccinia arnicalis.— Spots pallid or none; sori amphigenous, 

 clustered, crowded or confluent, reddish brown; .y/r'/^jr/>^;^.ysubglobose, 

 munitely rough, .0008-.0012 of an inch broad, reddish-brown, con 

 taming one or two nuclei ; kleutospores intermingled with the stylo- 

 spores, obovate or elliptical, obtuse, scarcely constricted, minutely 

 rough, .00 (2- 00 1 8 of an inch long. .0008-00095 of an inch broad, 

 concolorous, the pedicel very shcirt. colorless. 



Living leaves of Arnica cordifolia. Colorado. T. S. Brandcgee. 

 Communicated by E. S. Rait. 



The fungus was found on plants growing at an altitude of 10,000 

 feet. The Puccinia spores are intermingled in the same sorus with the 

 Uredo spores and are of the same color with them. The latter have 

 no pedicels when mature. The sori occur chiefly on or near the midrib. 



Puccinia Troximontis.- Spots pale or obsolete; sori ampni- 

 genous, scattered, reddish-brown or blackish-brown; strhspores ?,uh- 

 globose, minutely rough, .0008-.0012 of an inch broad, reddish brown ; 

 teleutospores subelliptical, obtuse, scarcely constricted, minutely rough, 

 .0011-.0014 of an inch long, ooo8-.ooo9of an inch broad, blackish- 

 brown, the pedicel short and colorless. 



Living leaves of Troximon cuspidatum. Utah. May. Jones. 



This species is closely related to the preceding one, but differs 

 from it in its scattered sori and in having the teleutospores in distinct 

 and darker colored sori. 



Puccinia acrophila. —Spots brown, sometimes tinged with pur- 

 ple ; sori scattered or crowded, reddish-brown ; spores obovate or 

 elHptical, obtuse, constricted at the septum, rough or verruculose, 

 .0011- 0013 of an inch long, .0008 of an inch broad, the pedicel short 

 and colorless. 



Living stems and leaves of Synfhyris pinnatifida Utah. Jones. 



The fungus was found on plants growing at an altitude of 12,000 

 feet. The sori most frequently occur at or near the tips of the leaf 

 segments, which suggests the specific name. 



Puccinia Mertensi.^.— Spots none; sori amphigenous, red- 

 dish-brown, scattered or in clusters ; spores elliptical, slightly con- 

 stricted at the septum, obtuse, rough or verruculose, .001 1-.0014 of 

 an inch long, .0008-. 0009 of an inch broad, the pedicel short and col- 

 orless. 



Living leaves of Mertensia Sibirica, Colorado. Brandegee, Utah, 

 July, Jones. 



The fungus occurs on plants growing at an altitude of 11,000 feet. 

 It is closely related to the preceding species and possibly future ob- 



