Part 6, 1921] AECIDIACEAE 451 
low, cupulate, 0.2-0.5 mm. in diameter; peridium white, becoming honey-yellow or slightly 
darker upon aging, the margin recurved, erose; peridial cells oblong in radial section, 15-24 
by 24-29 n, slightly overlapping, the outer wall 5-9 « thick, transversely striate, the inner 
wall thinner, 2.5—4 4, moderately verrucose; aeciospores ellipsoid, globoid, oblong, or irregular, 
15-19 by 18-26 u; wall pale-yellow or colorless, 1-1.5 » thick, uniform, finely and closely 
verrucose. 
III. Telia rather numerous, epiphyllous, caulicolous, occasionally hypophyllous, scattered, 
round or elliptic, 0.1-1 mm. across, somewhat tardily naked, pulverulent, chestnut-brown, 
ruptured epidermis conspicuous; teliospores (plains form) ellipsoid or obovoid, 13-21 by 21- 
27 w; wall cinnamon-brown, I-1.5 » thick, 3-5 uw at apex because of a cap-like semi-hyaline 
umbo; (mountain form) broadly ellipsoid, obovoid, or globoid, 18-24 by 24-32 yu; wall light 
chestnut-brown, 1.5~2 « thick, 5-7 » at apex because of a cap-like semi-hyaline umbo; (Pacific 
slope form) globoid, obovoid or irregular, 19-24 by 24-35 yu; wall chestnut-brown, 2-3 yw thick, 
6-9 » at apex because of a cap-like semi-hyaline umbo; all three forms finely and closely verru- 
cose with the markings arranged in longitudinal lines; pedicel hyaline, short, fragile. 
On FABACEAE: 
Vicia americana Muhl., Arizona, California, Colorado, Indiana, Iowa, Kansas, Minnesota, 
Montana, Nebraska, New Mexico, Oregon, South Dakota, Utah, Washington, Wis- 
consin; Alberta, British Columbia. 
Vicia californica Greene, California. 
Vicia oregana Nutt. (V. truncata Nutt.), Colorado, Nevada, Utah, Wyoming; Ontario. 
Vicia sparsifolia Nutt. (V. linearis Greene), Colorado, Iowa, Kansas, Montana, Nebraska, 
Nevada, North Dakota, South Dakota, Utah, Washington; Saskatchewan. 
Vicia trifida D. Dietr. (V. caespitosa A. Nelson), Utah, Wyoming. 
‘TYPE LOCALITY: Colorado, on Vicia americana. 
DISTRIBUTION: From Ontario to Indiana, and westward to the Pacific coast; also in Europe. 
Exsiccatr: Barth. N. Am. Ured. 201, 585, 586, 981, 982, 1783, 1886; Barth. Fungi Columb. 
3888, 4089, 4990; Brenckle, Fungi Dak. 191, 191a, 205; Clements, Crypt. Form. Colo. 590; Ellis, 
N. Am. Fungi 1430, 1431; Ellis & Ev. Fungi Columb. 874, 1894, 2095; Garrett, Fungi Utah. 122, 
246; D. Griff. W. Am. Fungi 84, 84a; Sydow, Ured. 1902. 
21. Pucciniola coordinata Arthur. 
Uromyces coérdinatus Arth. Bull. Torrey Club 48: 33. 1921. 
O. Pycnia hypophyllous, scattered abundantly over surface of leaf, preceding and 
accompanying the aecia, pale- or honey-yellow, barely noticeable, globoid or flask-shaped, 
100-140 » broad; ostiolar filaments 50~75 » long, protruding above surface of leaf. 
I. Aecia hypophyllous, evenly scattered over surface of leaf, at first bullate and opening 
by a pore, 0.4-0.7 mm. across; peridia erect or slightly recurved, erose; peridial cells cuboidal 
or polygonal, 22-24 by 23-29 », abutted or slightly overlapping, the outer wall 10-12 u« thick, 
striate, the inner wall 3-5 » thick, noticeably verrucose; aeciospores globoid or broadly 
ellipsoid, 15-19 by 19-24 »; wall nearly or quite colorless, 1-2 » thick, finely verrucose. 
III. Telia hypophyllous, at first arising from and evenly filling the aecial cups, afterward 
independently but similarly grouped, the rutpured epidermis appearing like a peridium, 
somewhat pulverulent, dark chocolate-brown, 1-2 u thick, sometimes with a small colorless 
papilla over the apical pore, closely and noticeably verrucose, inclined at times to be striate; 
pedicel fragile, colorless, largely deciduous. 
On EUPHORBIACEAE: 
Tithymalus Palmeri (Engelm.) Arth. (Euphorbia Palmeri Engelm.), California. 
Tyrr Loca.ity: Big Bear Lake, California, on Tithymalus Palmert. 
DISTRIBUTION: Known only from the vicinity of the type locality. 
22. Pucciniola venusta (Dietel & Holway) Arthur. 
Uromyces venustus Dietel & Holway; Holway, Bot. Gaz. 31: 326. 1901. 
O. Pycnia not known. 
J. Aecia hypophyllous, in small groups 1-2 mm. across or solitary, cupulate, 0.2~-0.5 mm. 
across, 0.2 mm. high, deep-seated in the host-tissue, often opening only by a pore; peridium 
whitish, usually not projecting above the host-tissue; peridial cells narrowly rectangular in 
tadial section, somewhat curved, 16-19 by 48-67 u, abutted or slightly overlapping, the outer 
wall 3-4» thick, finely and closely verrucose, the inner wall 2-3 2 thick, finely and closely 
