Part 6, 1921] AECIDIACEAE 465 
I. Aecia chiefly hypophyllous, gregarious on yellow spots, roundish or oval in outline, or 
elongate when on the veins and petioles, 1-10 mm. across, short, cupulate, 0.2-0.3 mm. in 
diameter; peridium yellowish, erose; peridial cells rhombic, 19-23 by 32-38 uw, the outer wall 
finely striate, 6—8 » thick, the inner wall verrucose, 2.5-3 » thick; aeciospores globoid, 15-19 
by 22-26 u; wall colorless, 1—1.5 » thick, very closely and finely verrucose. 
Ill. Telia amphigenous, scattered, round, small, 0.2-1 mm. across, tardily naked, dark 
chestnut-brown or cinerous when covered, slightly pulverulent; teliospores broadly ellipsoid, 
20-28 by 30-48 u, usually rounded at both ends, slightly or not constricted at septum; wall 
chestnut-brown, uniformly 2-2.5 » thick, smooth; pedicel deciduous, colorless. 
On PRIMULACEAE: 
Dodecatheon cruciatum Greene, California. 
Dodecatheon latifolium (Hook.) Piper (D. Hendersonii A. Gray), California, Oregon. 
TyrE LocaLity: Antioch, California, on ‘‘ Dodecatheon Meadia,” error for D. latifolium. 
DISTRIBUTION: Pacific slope of the United States. 
Exsrccatr: Barth. N. Am. Ured. 155; Ellis, N. Am. Fungi 1059. 
22. Allodus Swertiae (Winter) Orton, Mem. 
N. Y. Bot. Gard. 6:195. 1916. 
Aecidium Swertiae Opiz, Seznam 111, hyponym. 1852. 
Puccinia Swertiae Winter, in Rab. Krypt.-Fl. 1: 205. 1881. 
Dicacoma Swertiae Kuntze, Rev. Gen. 33: 470. 1898. 
O. Pycnia amphigenous, not conspicuous, gregarious, in circular or elongated groups 
1-5 mm. across, stirrounded by the aecia, globoid, 100-130» in diameter, 100-120 n high; 
ostiolar filaments short, rarely protruding above the epidermis. 
I. Aecia chiefly hypophyllous, gregarious, on yellow spots, roundish or oval in outline, 
1.5-4 mm. across, short, cupulate, 0.25-0.3 mm. in diameter; peridium whitish, erose; peridial 
cells rhomboidal, 20-27 by 26-40 u, the outer wall finely striate, 7-10 » thick, the inner wall 
rather conspicuously verrucose, 3-5 u thick; aeciospores globoid, 16-23 by 21-27 u; wall color- 
less, 1-1.5 « thick, very finely verrucose. 
III. Telia amphigenous, scattered or in annular groups, sometimes becoming confluent, 
0.3-1 mm. across, rather early naked, chestnut-brown, flattish, pulverulent, ruptured epider- 
mis conspicuous: teliospores ellipsoid, 20-27 by 33-43 u, usually rounded at both ends, slightly 
or not constricted at septum; wall dark cinnamon-brown, about 2 u thick, uniform or rarely 
thickened to 3 » above, smooth; pedicel short, colorless, fragile. 
On GENTIANACEAE: 
Swertia Fritillaria Rydb., Utah. 
Swertia ovalifolia Greene, Idaho. 
Swertia perennis L., Alaska. 
Swertia scopulina Greene, Colorado. 
Tyre LocaLity: Bohemia, on Swertia perennis. 
DistRrputTion: Rocky Mountain region; also in Europe. 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 2?: f. 129. . 
ExsiccaTr: Clements, Crypt. Form. Colo. 144; Garrett. Fungi Utah. 241. 
23. Allodus opulenta (Speg.) Orton, Mem. N. Y. 
Bot. Gard. 6: 195. 1916. 
Puccinia opulenta Speg. Anal. Soc. Ci, Argent. 9: 170. 1880. 
Aeccidium Ipomoeae Speg. Anal. Soc. Ci. Argent. 9: 173. 1880. 
Dicaeoma opulentum Kuntze, Rev. Gen. 34: 469. 1898. 
O. Pycnia not seen. 
I. Aecia hypophyllous, scattered or loosely gregarious on yellow spots, irregular in out- 
line, 1-4 mm. across, short-cylindric, 0.3-0.4 mm. in diameter; peridium whitish, erose; peridial 
cells rhombic, 18-26 by 30-40», the outer wall nearly smooth, 4-6 » thick, the inner wall 
rather coarsely and deeply fimbriate-verrucose, 6-9 4 thick: aeciospores globoid, 18-24 by 
21-31 uw; wall colorless, 3-3.5 » thick, conspicuously verrucose. 
III. Telia chiefly epiphyllous, scattered or arising from around or opposite the aecia, 
roundish or oval in outline, 0.2-1 mm. across, rather early naked, dark chocolate-brown or 
blackish, pulvinate, somewhat pulverulent; teliospores ellipsoid, 24-35 by 45-704, usually 
somewhat narrowed at both ends, scarcely constricted at septum; wall dark chestnut-brown, 
