MILDEWS, RUSTS AND SMUTS 
131 
Puccinia pazschkei, Dietel. 
Teleutospores. Sori epiphyllous, or rarely hypophyllous, 
usually arranged in irregular, concentric circles, here and 
there scattered, circular, margined by an irregular fringe 
of the ruptured epidermis, dark brown, becoming pulveru¬ 
lent ; spores elliptic-oblong, rounded at both ends, slightly 
constricted at the septum, apex very slightly thickened, not 
papillate, epispore pale, clear brown, distinctly warted, 
30 —^45 X 15—20 IjL ; pedicel hyaline, slender, about 
equalling the spore in length. 
I have frequently found this species on living leaves 
of Saxifraga longifolia, Lapeyr., in Kew Gardens. Pre¬ 
viously only known from Switzerland and Austria, upon 
Saxifraga aizoon, Jacq., S. hostii, Tausch., and S. longi¬ 
folia, Lapeyr. 
Has possibly been passed over in this country as Puc¬ 
cinia saxifragae, Schlecht., from which it differs in the 
warted epispore, and in other characters. 
Puccinia huteri, Sydow, will also probably be found in 
this country. It occurs on living leaves of Saxifraga 
mutata, L., Lapeyer, in Austria. Its characters are as 
follows : 
Uredospcres ? 
Teleutospores. Sori on both sui faces of the leaf, scattered 
or gregarious, sometimes encroaching on each other, 
rounded or oblong, i—2 mm. long, covered for a long time 
by the grey epidermis, becoming naked and pulverulent, 
dusky brown ; spores oblong, tip with a paler papilla up 
to 8 p long, constricted at the septum, base rounded or 
narrowed, punctate, not striate, brown, 35—54 x 14—19 p, 
pedicel colourless, slender. 
GROSSULARIACEAE 
GROSSULARIA 
Puccinia ribis, D.C. 
Teleutospores. Sori powdery, chestnut-brown, bordered 
by the torn epidermis, in circular groups, often crowded 
into each other, on yellowish or brownish spots, on the upper 
surface of the leaf ; spores elliptical or oblong, ends rounded, 
or the tip rarely narrowed, slightly thickened, scarcely 
constricted at the septum, warted, chestnut-brown, 25^— 
45 X 18—25 p, pedicel colourless, slender, about equal in 
length to the spore. 
On gooseberry-— Ribes grossularia ; black currant-— 
