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334 BOTANICAL GAZETTE | MAY 
Puccinia Desmanthodii Diet. & Holw., n. sp.—Sori on the 
under side of large irregularly limited violet or yellow spots, 
small, but closely crowded into large groups in a kind of stroma 
formed of dark brown firm united paraphyses; teleutospores 
oblong or mostly fusiform, narrowed to both ends or truncate at 
apex, not at all or only slightly constricted, 40-60 X 10-174, 
smooth, thickening at apex conical or cucullate, light brown; 
pedicel short or up to 40» long, firm, tinted. 
On Desmanthodium ovatum, Oaxaca, October 18, 1899, no. 3665. Aecidia 
occur on some of the leaves but are too old to describe. 
Puccinia Iostephanes Diet. & Holw., n. sp.—Sori mostly 
epiphyllous on small purple spots, less numerous on the under 
side of the leaf, scattered, black; teleutospores elliptical, 
rounded at both ends, scarcely constricted, chestnut-brown, ver- 
rucose, a light-colored cucullate thickening at the apex and on 
the side of the lower cell, 37-50 x 25-35 »; pedicel long, hyaline, 
easily breaking at the base from the host plant, often laterally 
inserted. 
On lostephane heterophylla? Cuernavaca, September 30, 1899, no. 35435 
on Viguiera dentata, Oaxaca, October 21, 1899, no. 3543, and October 25, 
1899, no. 3744. Type is on no. 3543, the host being an Iostephane which is 
br eoees Ll. heterophylla, although it differs somewhat from other Mexican 
specimens 
Puccinia Guardiolae Diet. & Holw., n. sp.—Sori on purple 
spots, hypophyllous, rarely single sori epiphyllous, punctiform, 
scattered; uredosori dark brown; uredospores nearly globose, 
elliptical or obovate, 24-32 22-25, dark brown, echinulate, 
with two germ-pores; teleutosori blackish, strongly convex, 
firm, small; teleutospores clavate, rounded at apex, or more 
rarely truncate, with a hyaline cucullate thickening, narrowed to 
the base or rounded, constricted, 45-60 X 18-25 , smooth, pale 
brown, germinating at once, whitening the sori; pedicel hyaline, 
firm, mostly shorter than the spore. 
On Guardiola Mexicana, Cuernavaca, September 28, 1899, no. 3513- 
