26 BOTANICAL GAZETTE [JULY 
spores mostly globose or subovate, 20-24 in diameter, pale- 
brown, echinulate, with about 8 germ-pores: teleutosori black, 
elliptic or somewhat linear, pulvinate; spores uniformly globose, 
22-27 in diameter, chestnut-brown, smooth, apex broadly 
hooded (5—7.5m thick) and darker colored; pedicel brown, firm, 
long.— Near U. Peckianus, from which it is distinguished by the 
round teleutospores—On 4/gopogon cenchroides, near City of 
Mexico, Oct. 1. 
Puccinia Zexmenie Diet. & Holw., n. sp.— Sori scattered, on 
both sides of the leaf: uredospores elliptical to globose, 20-22 
by 17—20p, bright brown, echinulate: teleutospores elliptical, 
rounded at both ends, not at all or only slightly constricted, 35— 
45 by 25-33; epispore chestnut-brown, 4—5 thick, apex not at 
all thickened or sometimes with a small cucullate thickening; 
membrane closely reticulated with narrow ridges ; pedicel longer 
than the spore, thin, colorless, not rarely inserted on the side, 
easily breaking from the leaf—On Zexmenia podocephala, Gua- 
dalajara, Oct. 12. 
Puccinia opaca Diet. & Holw., n. sp.— Sori small, black, scat- 
tered, on both sides of the leaf: uredospores elliptical, 18-20 
by 16-174, light-brown, echinulate: teleutospores elliptical, 
rounded at both ends, slightly constricted, 30-36 by 24-28p, 
dark chestnut-brown, mostly not thickened at apex; mem- 
brane coarsely reticulated with broad ridges; pedicel colorless, 
to gom long, occasionally inserted on the side, easily sep- 
arating from the leaf—On Zexmenia ceanothifolia, Guadalajara, 
Octy-12. 
The two preceding species, although much alike, are easily distinguished 
by the size of the teleutospores and the markings of the membrane. 
Puccinia tageticola Diet. & Holw., n. sp.— Sori on both sides 
of the leaves, scattered, small, on the stems and pedicels, large, 
pulvinate, naked: uredosori brown; spores, elliptical, obovate, 
or globose, 24-31 by 17—24p, light-brown, echinulate: teleuto- 
sori black; spores elliptical, rounded at both ends, slightly con- 
stricted, 44-52 by 30-35, epispore smooth, chestnut-brown, 
apex with a broad, hooded, often hyaline thickening; pedicel to 
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