1921] LONG—RUSTS 43 
This species is intermediate between Ravenelia mesillana and R. papillifera. 
Some of the mounts from the material collected near Tucson (no. 5537) have 
nearly all of the teliospore heads smooth, while other slides from the same 
locality, as well as the material collected in Sabino Canyon (no. 6918 Long) in 
the foothills of the Santa Catalina Mountains, have a large number of the 
heads papillate. 
RAVENELIA SILIQUAE Long 
This rust was collected June 1920, at San Antonio, Texas, on 
the leaves, twigs, branches, and pods of Acacia farnesiana, In 
many cases young pods were found with the uredinia just sporulat- 
ing, while the leaves and twigs of the same tree showed old uredinia. 
This proves the writer’s contention in a previous article’ that the 
twig and leaf rust on this host was R. siliquae, which up to that 
time had only been collected on the pods. 
RAVENELIA FRAGRANS Long 
A Ravenelia collected on the leaves and pods of Mimosa biunci- 
fera in Arizona, by Leslie N. Goodding, was sent to the writer for 
identification. A careful comparison of this material with the 
type of R. fragrans shows no essential characters sufficient to 
warrant making it a new species. The paraphyses in the Arizona 
rust are slightly more clavate than those found in the typical 
R. fragrans, while many of the teliospore heads are nearly smooth. 
Each of the papillate cells bears 1-4 hyaline papillae, 1-3 u long. 
The stipe is usually short, hyaline, and deciduous, but occasionally 
one is found which measures up to too uw. Many telial heads of 
the typical R. fragrans show cells with few and very short papillae 
similar to the Arizona material. 
This rust has been collected in two localities in Arizona, the 
Baboquivari Mountains, October 24, 1919 (nos. 6534 and 6535 
Long), and Rosemond, December 17, 1920 (no. 6969 Long). The 
latter collection has a large percentage of the teliospore heads 
smooth or with only an occasional head showing any papillate 
cells, while the 1919 material has heads fairly typical of R. fragrans 
as it occurs on Mimosa fragrans, yet the two collections are un- 
questionably the same species. 
* Notes on new or rare species of Ravenelia. Bot. Gaz. 64:57-69. 1917. 
