

1901] MEXICAN FUNGI 333 
thickening, smooth, dark chestnut-brown, 40-50X 32-364; 
pedicel long (up to 125), tou thick, hollow at the base SHY 
easily breaking from the leaf. 
On Eupatorium espinosarum, Oaxaca, October 17, 1899, no. 3651. 
PUCCINIA VIGUIERAE Peck.—On IV. ficta, near Tula, September 20, 
1898, no. 3136; on V. excelsa, Rio Hondo cafion, near City of Mexico, Septem- 
ber 22, 1898, no. 3160; City of Mexico, October 9, 1898 ; no. 3039; on Gymno- 
lomia Ghiesbreghti?, Oaxaca, October 21, 1899, no. 3700; on Viguiera, Toluca, 
September 20, 1898, no. 3178; on Gymnolomia subflexuosa, Oaxaca, October 
17, 1899, no. 3645; on Verbesina trilobata, Oaxaca, October 24, 1899, no. 
3731; on Verbesina virgata, Rio Hondo cafion, near City of Mexico, October 
30, 1899, no. 3751; on Verbesina montanifolia, Patzcuaro, October 10, 1899, 
0. 3604; on Viguiera, Chapala, September 20, 1899, no. 3469; on Calea 
Zacetechichi var. rugosa, Cuernavaca, September 30, 1899, no. 3534; Sep- 
tember 28, 1899, no. 3512; on Cadea hypoleuca, Oaxaca, October 17, 1899, 
no. 3648. 
Puccinia ferox Diet. & Holw., n. sp.—Sori pulverulent, large, 
irregular, brown, attacking the upper leaves and occasionally 
the flowers, often destroying the plants, the leaves being much 
thickened and deformed and often entirely covered with the 
spores on both sides; teleutospores rounded at both ends, 
Strongly constricted, with epispore uniform in thickness, pale 
brown, finely verrucose, 33-43 X 20-26; pedicel short, fragile. 
The spores germinate at once. 
On Verbesina aera Oaxaca, October 21, 1899, no. 3704. A very 
destructive specie 
Puccinia Electrae Diet. & Holw., n. sp.—Sori on various 
colored spots on the upper side of the leaf, less numerous on 
the lower side, small, scattered; uredosori dark brown; uredo- 
Spores obovate or elliptical, 28-35 x 21-25 4, echinulate, brown; 
teleutosori naked, black; teleutospores elliptical, rounded at 
both ends, scarcely constricted, verrucose, apex not thickened, 
36-48 X 24-31; pedicel long, hyaline, or next the spore 
somewhat tinted, easily separating at the base from the host 
plant. 
On Electra Galeottii?, Oaxaca, October 18, 1899, no. 3664. 
