124 ARTHUR: NEW SPECIES OF UREDINEAE 
issued as No. 1825 in Ellis & Everhart’s North American Fungi 
may be accepted as the type. The collections give the host as 
Cassia Chamaecrista, which by some taxonomists is considered to 
be the same as C. fasciculata. The fungus much resembles 
Aecidium Torae P. Henn., occurring on Cassia Tora in Ceylon 
and Africa, but varies in seemingly important ways, particularly 
in having well-developed pycnia, which are absent in the foreign 
collections examined. 
Aecidium modestum sp. nov. 
O. Pycnia Se een inconspicuous, subepidermal, globoid, 
160-220 pw in diameter. 
I. Aecia eautiedisiies in groups 4-10 mm. long, short cylindric, 
0.3-0.4 mm. broad; peridium erect, erose or somewhat lacerate; 
peridial cells seen with difficulty in side view, in face view very 
irregular in shape, 19-23 by 35-58 u, the outer wall thin, about 
I-I.5 u, almost smooth, the inner and side walls 2-3» thick, 
closely and prominently verrucose; aeciospores ellipsoid or oblong, 
23-26 by 27-32 uw; wall colorless, 1-1.5 w thick, finely and closely 
verrucose. 
On Zephyranthes sp., near Ixmiquilpan, State of Hidalgo, 
Mexico, 1905, Rose, Painter & Rose 8952. The species differs 
from A. Zephyranthis Shear, also from Mexico, in possessing larger 
pycnia and aeciospores, and in having more delicate peridial cells. 
Aecidium ingenuum sp. nov. 
O. Pycnia hypophyllous, discoid, inconspicuous, subcuticular. 
80-130 uw broad by 40-50 pw high, without ostiolar filaments. 
I. Aecia hypophyllous, closely packed in rows, nearly cylindric 
to tongue-shaped, often confluent; peridium erect, 0.5-o.8 mm 
high, very delicate and fragile; peridial cells in radial section 
narrowly oblong or linear, 10-16 by 32-42 4, somewhat over- 
lapping, the outer wall 1-2 w thick, smooth, the inner wall 3-5 u 
thick, closely verrucose with slender tubercles; aeciospores globoid 
or broadly ellipsoid, 13-16 by 16-23 yu; wall colorless, 2-3 u thick, 
half the thickness being due to the close, rather fine and somewhat 
deciduous tubercles. 
On Picea canadensis (Mill.) B. S. P., Fish Creek, Wisconsin, 
June 30, 1913, J. J. Davis; Solon Springs, Wisconsin, June 17, 
1914, J. J. Davis; and Walden, Vermont, June 8, 1917, C. L. 
Orton, communicated by C. R. Orton (type). This is the first 
