386 BOTANICAL GAZETTE [JUNE 
is insured; incidentally also the leading herbaria of the country have 
been enriched with many valuable specimens, while not a few new 
species of flowering plants have been brought to light. 
The collections made by Mr. Hotway show that Mexico has an 
abundant rust flora, and especially so in the groups represented by 
the genera Ravenelia and Uropyxis. If collections made during 
September, October, and November, and over a comparatively 
small part of that great country have proved so interesting and val- 
uable, more extended search is likely to be rewarded with almost 
or quite equal results for some time to come. 
The following enumeration includes the portion of Mr. Hotway’s 
uredineous collections in Mexico, not heretofore published, possessing 
leguminous hosts, 7. ¢., the rusts occurring upon members of the 
families Fabaceae, Cassiaceae, and Mimosaceae. 
1. Uromyces Triroti (A. & S.) Levy.—On Trifolium amabole 
HBK., Jalapa, Oct. 3, 1898, no. 3091: Trifolium sp., Pachuca, 
Oct. 27, 1903, no. 5245; City of Mexico, Oct. 28, 1899, no. 3746. 
2. Uromyces MEDICAGINIS-FALCATAE Wint.—On Medicago 
denticulata Willd., Toluca, Sept. 19, 1898, no. 3129. 
3. Uromyces rugosa, n. sp.—Uredosori hypophyllous, cinnamon- 
brown; uredospores globoid, 20-24 by 21-27; wall light yellow, 
medium thick, 2-2.5, minutely and sparsely verrucose, pores 8, 
scattered: teleutosori hypophyllous, small, round, 1™™ or less across, 
scattered or somewhat gregarious, soon naked, pulverulent, dull 
chocolate-brown; teleutospores broadly oval or globoid, 18-22 by 
21-27, wall dark chestnut-brown, medium thick, 2-3, rugose Or 
irregularly and closely verrucose, apex usually bearing a very low, 
hyaline umbo; pedicel colorless, short, fragile, mostly deciduous. 
—On Lupinus sp., Amecameca, Oct. 21, 1903, no. 5208. 
The very rough and opaque spores easily separate this species from all others 
reported from North America on Lupinus. The uredo stage was not well shown 
on the specimens studied, and is consequently incompletely described. 
4. Uromyces montanus, n. sp.—Teleutosori hypophyllous, small, 
round, crowded in circinating groups, 5-10™™ across, centripetal 
in development, early naked, cinnamon-brown or darker, usually 
cinereous from germination; . teleutospores oval or obovate, pale, 
18-24 by 30-40, wall very pale brownish, smooth, thin, 1-1-5": 
