42 BOTANICAL GAZETTE [JULY 
chocolate brown, ruptured cuticle inconspicuous; paraphyses none, 
teliospore heads light chestnut brown, 5-6 cells across, 60-80 y, 
average for twenty heads 70.3 uw, 8-16 marginal cells, 8-18 inner 
ones, heads more or less flattened, smooth; cysts hyaline, in two 
rows beneath the entire head, appressed, not cohering, oval to 
obovate, easily swelling and bursting in water; pedicel short, 
hyaline, deciduous. 
On Mimosaceae. Type collected on Acacia suffrutescens in Baboquivari 
Mountains, Arizona, October 24, 1919, by Leslie N. Goodding (no. 6983 Long). 
Ravenelia cassiae-covesii Long and Goodding, sp. nov. 
o. Pycnia unknown. 
II. Uredinia amphigenous, scattered, round or irregular, 
I-2mm. across, subcuticular, early naked, cinnamon brown, 
ruptured cuticle inconspicuous; paraphyses very few, intermixed 
with the spores, clavate-capitate to capitate, hyaline, 11-13 X 
37-06 w, average for ten paraphyses 12.548 y, stipe solid, 
hyaline, about 5 u thick, walls of heads thin, 1-1 .5 uw thick, smooth; 
urediniospores broadly ellipsoid, obovate to subglobose, 15-20 
17-23 w, average for forty spores 17.2X20.1y, walls cinnamon 
brown, 2-2.5 » thick, verrucose-echinulate, germ pores eight, in 
two irregular zones of four pores each, equidistant from the equator, 
or scattered in the subglobose type. 
III. Telia amphigenous and caulicolous, scattered, round, 
o.5-I mm. across, subcuticular, early naked, chocolate brown, 
ruptured cuticle inconspicuous; paraphyses few, similar to those 
found in the uredinia; teliospore heads chocolate brown, 5-7 cells 
across, 50-84 u, average for forty heads 65.3 yu, 6-14 marginal 
cells, 6-20 inner ones, heads smooth or with half to two-thirds of 
the cells bearing a single, wartlike, semihyaline papilla, 1-4 u long, 
to each cell; cysts numerous, hyaline, globose, subappressed, in 
two or three rows, beneath entire head, slowly swelling and bursting 
in water; pedicel short, hyaline, deciduous. 
On Caesalpiniaceae. Type collected on Cassia covesii near Tucson, 
Arizona, by H. W. Thurston and Leslie N. Goodding, February 26, 1920 (no. 5537 
Long); also collected on same host in Sabino Canyon, near Tucson, March 9, 
1920, and January 4, 1921, by Leslie N. Goodding (nos. 6918 and 6972 Long). 
