1905] ARTHUR—RUSTS FROM MEXICO | 391 
10. Calliospora Farlowii, n. sp.—Spermogonia caulicolous, and 
sparingly on midrib of leaf, small, punctiform, yellowish-brown, 
conical, 80-100 broad, ostiolar filaments 25-40u long: teleutosori 
caulicolous, large, confluent, early naked, pulverulent, cinnamon- 
brown; teleutospores elliptical, 18-24 by 29-42, rounded at both 
ends, slightly or not constricted at the septum, inner wall cinnamon- 
brown, 2-3 thick, pores 2 in each cell, outer wall colorless, barely 
noticeable when swollen in water, minutely verrucose; pedicel color- 
less, about 6# thick, short and mostly deciduous——On Parosela 
domingensis (DC.) Heller ae domingensis DC.), Orizaba, Feb., 
1888 (W. G. Farlow). 
I am indebted to the collector for excellent material of this interesting species. 
In the selection of the specific name I take the opportunity of showing my appre- 
ciation of courtesies in sending me material, and also my high regard for the 
eminent services rendered by Dr. FARLow to botanical science. 
17. Calliospora Diphysae, n. sp.—Spermogonia amphigenous, 
crowded in dendritic groups, or disposed in lines, pale brown, bullate 
or hemispherical, subcuticular, too-175# broad and less than half 
as high: teleutosori amphigenous and caulicolous, round or elongated, 
I~5™™ long, early naked, nearly black; teleutospores elliptical, 
30-33 by 45~50#, rounded at both ends, not constricted at septum, 
inner wall dark chestnut-brown, 3-4 thick, pores 2 in each cell, 
outer gelatinous, pale amber-color, 3-4 thick in water, sparsely and 
evenly verrucose; pedicel half length of spore or longer, colorless, 
firm above, at base slightly bulbous and swelling in water to bursting. 
—On Diphysa suberosa Wats., Rio Blanco, near Guadalajara, 
Sept. 30, 1903, no. 5082. 
18. Uropyxis Nissourar (D. &. H.) Magn.—On WNissolia 
laxior Rose, Guadalajara, Sept. 25, 1903, no. 5039: N. hirsuta DC., 
Sayula, State of Jalisco, Oct. 8, 1903, no. 5127; Cuautla, State of 
Morelos, Oct. 2 3, 1903, no. 5230: Nissolia sp., Cuernavaca, Nov. I, 
1903, NO. 5309. 
These collections, except the one made in November, show a few ibileonpoces 
among the teleutospores. The uredospores are globoid or ellipsoid, pale yellow 
or nearly colorless, 12-16 in diameter, wall very thin, 0.75, finely verrucose, 
pores very indistinct, few. The paraphyses seen are capitate, thin- walled, and 
colorless. 
