68 BOTANICAL GAZETTE [JULY 
III. Teliospores intermixed in uredinia on the galls; teliospore 
heads liver brown, hemispherical, often depressed, smooth, 60- 
130, average for 40 heads 103m, 8-12 spores across, 20-38 
marginal spores, 40-78 inner ones, average number of spores in 
each head 84-94; cysts globose to subglobose, in 2-3 rows, pendant 
beneath entire head, not coherent, slow to burst in water; pedicel 
hyaline or slightly tinted, short, deciduous, compound. This is 
a description of the gall-producing form of Neoravenelia holwayi. 
For several years the writer has been finding a species of Ravenelia on 
mesquite (Prosopis juliflora) which produces large, fusiform, woody galls. At 
first this rust was referred to Rovenclia ari ee, oe + careful examination of 
the gall led tl These smooth 
teliospores were so constantly Souké Sasictataid with certain types of galls that 
the writer made a special study of the galls found on mesquite. This investi- 
gation showed that there was a Ravenelia present on galls throughout a certain 
zone which constantly produced smooth teliospore heads. A careful study of 
the Ravenelia on these galls failed to show any positive differences either in the 
urediniospores or teliospores which would separate this gall-forming species 
from the ordinary leaf form of Neoravenelia holwayi. There are wide variations 
in shape and size of the urediniospores, as is to be expected when one oF 
galls as compared to those found on the leaves. 
The galls were found in localities where the leaves of the mesquite were 
abundantly infected with the usual form of N. kolwayi. In the vicinity of 
_ San Antonio and Uvalde the galls were rare, but at Corpus Christi and Browns- 
ville they were rather common. From Del Rio west to New Mexico and 
Arizona all of the galls found « ite were of a different type and were 
associated with the ti ues a of Desaulia arizonica. The galls produced by 
Neoravenelia holwayi are smoother and more fusiform than those caused by 
Renae Seen, in R: arizonica the galls are rather brittle, due to the 
larg yma i pe d in the gall vac ereennaanger 
when alive these galls have deep transverse fissures in their surfaces. 
which are borne the soliedaees and idicepoces. But few sori of any kind 
re were found on galls collected as late as November. The surface of the galls 
- baoph ater gendinie gis tacciie Se 
; telio 
