Part 5, 1920] AECIDIACEAE 375 
. Ill. Telia amphigenous, many, scattered or sometimes rather confluent, angular or 
irregular, 0.2-0.5 by 0.3-1 mm., tardily naked, blackish or lead-colored; stroma variable, 
sometimes weakly developed, sometimes forming a thick golden-brown layer; teliospores 
ellipsoid, 17-21 by 32-37 4, rounded or truncate at apex, rounded or narrowed below, 
constricted at septum; wall chestnut-brown, 1-2 « thick, sometimes slightly thickened at 
apex up to 44; pedicel pale, deciduous; mesospores very numerous, 50-99 + per cent., ir- 
regularly obovoid or ellipsoid, 15-20 by 23-33 yu, the wall chestnut-brown, rather thin, 1-2 p, 
thickened slightly up to 4 4 above, or not at all, the pedicel pale, fragile. 
On ALLIACEAE: 
Allium Cepa L., Connecticut. 
Allium Schoenoprasum L., Connecticut, New York. 
TYPE Locatrry: England, on leek [Allium Porrum]. 
DISTRIBUTION: Eastern United States, rare, possibly not established; also in Europe and Asia. 
IuLustRrations: Beitr. Krypt. Schweiz 2?: f. 61; Krypt.-fl. Brand. Pilze 3: f. B160. 
150. Dicaeoma granulisporum (Ellis & Gall.) Kuntze, Rev. Gen. 33: 
469. 1898. 
Puccinia granulispora Ellis & Gall.; Ellis & Ev. Bull. Torrey Club 22:61. 1895. 
O. Pyenia amphigenous, scattered or crowded in groups 1-3 mm. across, conspicuous, 
projecting, honey-yellow, flask-shaped or globoid, 96-112 » wide by 112-125 » high; ostiolar 
filaments short, up to 96 » long. 
I. Aecia amphigenous, scattered or gregarious, cylindric, 0.2-0.5 mm. wide; peridium 
whitish, the margin usually erect, erose or lacerate; peridial cells rhomboidal or rectangular, 
17-22 by 23-42 u, overlapping, the outer wall 7-9 « thick, transversely striate, the inner wall 
thinner, 3-5 u, closely and finely verrucose; aeciospores angularly ellipsoid or globoid, 16-23 
by 23-32 4; wall colorless, 1.5~—2 » thick, closely and finely verrucose. 
II. Uredinia amphigenous, scattered, oval or oblong, 0.3-0.5 mm. wide by 0.5-1.5 mm. 
long, tardily naked, pulverulent, yellowish- or golden-brown, ruptured epidermis conspicuous; 
urediniospores broadly ellipsoid, globoid, or obovoid, 23-32 by 28-39 u; wall yellow or golden- 
brown, 1.5—2.5 yz thick, closely and finely echinulate, the pores 8-15, scattered, usually promi- 
nent and easily seen in lactic acid. 
III. Telia amphigenous or caulicolous, many, scattered, irregularly oblong, linear or 
confluent into well defined areas, 0.3-0.7 mm. wide by 0.5-1.5 mm. long, or up to 7 mm. long 
on the stem, rather tardily naked, opening by a longitudinal slit, finally becoming somewhat 
pulverulent, blackish, ruptured epidermis conspicuous; stroma golden-brown, variable, usually 
only slightly developed, sometimes strongly developed; teliospores clavate or ellipsoid, 20-32 
by 42-70 », obtuse or rounded above, obtuse or narrowed below, somewhat constricted at 
septum; wall cinnamon-brown below, chestnut-brown above, 1-2 4 thick, thicker at apex, 
2.5~8 », smooth; pedicel usually-short, colorless or light-yellow; mesospores 10-60 per cent., 
ellipsoid or obovoid, 18-25 by 30-50 y, the wall cinnamon- or chestnut-brown, thin, 1-2 y, 
thicker at apex, 2.5-8 yu, the pedicel usually short. 
This species agrees in all essentials with Nigredo bicolor (Ellis) Arth., except in the possession 
of some two-celled teliospores. ‘The forms are separately maintained for convenience, but should 
eventually be united under one name. 
ON ALLIACEAE: 
Allium cernuum Roth, Idaho, Montana; Alberta. 
Allium Nevii S. Wats., Oregon. 
Allium recurvatum Rydb., Montana. 
Allium stellatum Ker, Montana. 
Allium sp., Colorado, Washington; British Columbia. 
Typz LocALity: Montana, on stems and leaves of Allium cernuum. 
DISTRIBUTION: Mountainous regions from Oregon and Idaho northward into Canada. 
ILLUSTRATIONS: Holway, N. Am. Ured. 1: $l. 7, f. 31a; pl. 8, f. 310. 
151. Dicaeoma nodosum (Ellis & Hark.) Kuntze, Rev. Gen. 3°: 469. 
1898. 
Puccinia nodosa Ellis & Hark. Bull. Calif. Acad. 1:27. 1884. 
O. Pycnia amphigenous, honey-yellow, depressed-globoid, 144-200 by 110-144 u. 
I. Aecia amphigenous, on conspicuous yellow spots, in small groups; peridium short, 
