118 TWENTY-FIFTH REPORT ON THE STATE MUSUEM. 
23. P. Asrrris Schw. Aster’ Brand. 
Hypogenous ; spots,suborbicular, unequal, sometimes confluent, 
generally concave above and convex below, yellow, often stained 
with red purple or brown; sori clustered, distinct, crowded or 
confluent, surrounded by the ruptured epidermis, blackish-brown 
or black; spores oblong-clavate, constricted, .0015—.0019' long, 
.0006—.0007 broad; peduncle slightly colored, one-half to wholly 
as long as the spore. 
Leaves of asters, especially of Aster macrophyllus. Common. 
July to September. ; 
This is a very variable species. Variety purpurascens C. & P. 
has the spots plane, mostly purple and occupied by a few distinct 
small sori, with the spores a little smaller. It inhabits Aster 
acuminatus. Adirondack Mts. 
24. P. Grrarpu Pk. Gerard's Brand. 
Spots as in the. preceding species; sori clustered, compactly 
crowded together or confluent, tawny or cinnamon-brown ; spores 
and peduncle as in the preceding, but paler in color. 
Leaves of asters and goldenrods, especially of Aster simplex. 
This species is perhaps too near the preceding, from which it 
may, however, be distinguished at a glance by the different color of 
the sori and their densely confluent or matted mode of growth, 
which frequently causes the whole cluster to appear like one very 
large sorus. Sometimes the sori occur quite abundantly on the 
upper surface of the leaf. 
25. P. Crrcaz Pers. 
Hypogenous; spots pallid or brownish; sori clustered, small, 
often confluent, brown or tawny ; spores oblong, generally obtusely 
pointed, .001-.0013° long, .0005’ broad; peduncle mostly thick, 
about as long as the spore. 
Leaves of Circea Lutetiana and C. alpina. Common. July 
to September. 
In all our specimens on C. Lutetiana the sori have a dense 
matted appearance, but in all on C. alpina they are smaller and 
distinct, sometimes beautifully circinating and a little darker 
colored. 
26. P. sonra Schw. Compact Brand. 
Hypogenous; spots unequal, brown or purplish, often concave 
above and convex below; sori clustered or scattered, compact, 
sometimes densely matted together, blackish-brown or black; 
spores oblong-clavate, narrow, constricted, .0016—.0022' long, 
.0005' broad ; peduncle very short. 
