NEW NORTH AMERICAN UREDINEZR. 79 
Puccinia Wulfenie, D. & H. Sori amphigenous, princi- 
pally epiphyllous, isolated or erumping in concentrical cir- 
cular groups on somewhat thickened and _ blackish 
spots, pulverulent, cinnamon-colored. Teleutospores oblong, 
rounded at both ends and deeply constricted at the septum, 
light brown, smooth, with a hyaline papilla at the summit, 
30-40 x 15-19, germinating immediately after they have 
ripened, Pedicels short and deciduous. 
On Wulfenia cordata. Ukiah, Mendocino Co., May 22, 
1894, leg. W. C. Blasdale. 
Puccinia amphispilusa, D. & H. Sori amphigenous, 
of different size, from punctiform to 2 mm. diameter, scat- 
tered or forming an incomplete circle around a central sorus, 
pulverulent. Uredospores elliptical or subglobose, brownish, 
echinulate, 25-31 x 20-234. Teleutospores elliptical, rounded 
at both ends, moderately constricted at the septum, bearing 
a blunt, flat hyaline papilla at the apex and the upper end of 
the lower cell, smooth, brown, 30-40 x 17-25y. Pedicels 
rather long, delicate and deciduous. 
On Polygonum sp. Lassen Co., Cal., July 28, 1894, leg. 
F. P. Nutting. 
This species has much resemblance with Puce. Bistortae 
(Str.), but in the latter the teleutospores are smaller and 
never have a papilla. Apart from this, in P. Bistortae, the 
sori are formed exclusively on the lower side of the leaves. 
The same is the case in Puccinia mammillata, Schroet, and 
the papilla is here narrower and more abrupt. 
Puccinia mirifica, D. & H. Sori predominantly epiphy!- 
lous, often covering the whole surface of the leaf, small, 
chestnut-brown, long covered by the inflated epidermis, after- 
ward naked, pulverulent and confluent, containing uredo and 
teleutospores, both of exactly the same brown color and 
extraordinarily variable in form and size. Uredospores 
mostly ovoid, 24-40 x 18-34, echinulate with equatorial 
germ-pores. Teleutospores two-celled intermixed with 
single-celled ones, the two-celled measuring from 29 x 23 to 
