GRIFFITHS: West AMERICAN FUNGI 297 
On leaves and stems of Riddellia Coopert Gray (378, 378a and 
3786), Tucson, Arizona, Nov. 1900. This is a very common spe- 
cies with an interesting distribution. It may be collected at almost 
any season of the year, but is most conspicuous during the rainy 
season when the host is in a 
vigorous growing condition. Itis 
found in situations where the 
host receives the most moisture 
and the writer has never collected 
iton the dryer portions of the 
mesas. On the contrary, he has 
seen it usually in shallow washes 
which receive the drainage wa- 
ters from higher altitudes. It 
Was especially conspicuous dur- 
ing 1900 and Igor on the gov- 
ernment range reserve at the 
mouth of a culvert under the 
failroad. The aecidial stage was 
abundant here in autumn and 
Spring, 
c ‘ : . 6.  Afcidiospores, uredospores 
ee a ce oem 
: delliae. All magnified 315 except the 
Mey are to be found in some __ aecidiospores which are magnified 500. 
herbaria under Puccinia tanaceti Fic. 7: Teleutospores of Pucctnta 
DC. bouvardiae. X315- 
Puccinia bouvardiae sp. nov. 
_ Teleutosori mostly epiphyllous but often found below also, 
circular, scattered, prominent, black and ragged under a lens, the 
mains of the ruptured epidermis which is at first prominent soon 
te > teleutospores broadly elliptical, rounded below, 
ith a yellowish umbonate apiculum above, and often a similar 
gga on the lower cell immediafely below the septum, 
> Sitly constricted at the septum, 23-28 /# X 36-46 #2; epispore 
iad thick, dark brown, tuberculate ; pedicel broad, hyaline, per- 
ot nat crooked, one and a half to two and a half times the length 
(Fig oa roughened and commonly enlarged below the middle. 
On Bouvardia triphylla Salisb. (394), Santa Catalina Mts., 
