374 NORTH AMERICAN FLORA [VoLuME 7 
O. Pycnia amphigenous, crowded in small groups 1-2 mm. across, rather inconspicuous, 
honey-yellow or light-brown, flattened-globoid, 93-112 » wide by 58-77 » high; ostiolar fila- 
ments short, up to 70 » long, slightly projecting beyond the ostiole. 
I. Aecia amphigenous, crowded in small groups, cupulate, 0.1-0.2 mm. in diameter; 
peridium yellowish, the margin recurved, erose; peridial cells rhomboidal or rectangular, 
10-23 by 16-30 uw, overlapping, the outer wall nearly smooth, transversely striate, 3-9 » thick, 
the inner wall closely and finely verrucose, 2.5-5 u thick; aeciospores globoid, oblong or angular, 
15-24 by 18-30 yu; wall hyaline or light-yellow, 1.5-2.5 » thick, closely and finely verrucose. 
II. Uredinia amphigenous or caulicolous, scattered, often surrounded by telia, round or 
elliptic, 0.3~-0.7 mm. wide by 0.4-1 mm. long, sometimes confluent making sori 2-3 mm. long, 
tardily naked, opening by a longitudinal slit, yellow; urediniospores broadly ellipsoid or obo- 
void, 20-26 by 23-32 4; wall yellow, 1-2.5 » thick, finely and closely echinulate, the pores 
8-14, scattered, usually indistinct, even in lactic acid. 
III. Telia amphigenous or caulicolous, often confluent entirely covering portions of the 
stem, irregular or oblong, 0.3-1 mm. wide by 0.5~-4 mm. long, tardily naked or remaining 
covered, blackish or grayish-black, ruptured epidermis evident; stroma usually dense, well 
defined, cinnamon- or golden-brown, sometimes only slightly developed; teliospores clavate 
or ellipsoid, 16—30 by 40-74 x, truncate or rounded above, obtuse or narrowed below, constricted 
at septum; wall cinnamon-brown below, chestnut-brown at apex, 1.5-3 u thick, thicker at 
apex, 4-12 4, smooth; pedicel yellow, one half length of spore or less; mesospores 10-50 
per cent., ellipsoid, obovoid, or angular, 16-23 by 29-50 yz, the wall 1.5-3 y, thick, thicker at 
apex, 4-9 yp. 
ON ALLIACEAE: 
Allium acuminatum Hook., Idaho, Oregon, Utah, Washington. 
Allium attenuifolium Kellogg, California, Oregon. 
Allium Brandegei S. Wats., Colorado. 
Allium cernuum Roth, Colorado, Wyoming. 
Allium precox Brandegee, California. 
Allium scaposum Benth., Arizona. 
Allium serratum S. Wats., California, 
Allium unifolium Kellogg, California. 
Allium sp., Nevada; Morelos. 
TPYE LOCALITY: France, on Allium multiflorum. 
DISTRIBUTION: Western North America; also in Europe. 
node te Beitr. Krypt. Schweiz 2?: f. 250; Corda, Ic. Fung. 4: pl. 3, f. 31; Holway, N. 
Am, Ured. 1: pl. 7, f. 31e—-e; Krypt.-fl. Brand. Pilze 3: f. Bi6l. 
EXSICCATI: Barth, N. Am. Ured. 18, 1329, 1532; Ellis & Ev. N. Am. Fungi 2989; Garrett, Fungi 
Utah. 83 (in part). 
149. Dicaeoma Porri (Sow.) Kuntze, Rev. Gen. 33: 470. 1898. 
Uredo Porri Sow. Engl. oe pl. 411. 1810. 
Uredo alliorum DC. Fl. Fr. 6: 82. 1815. 
Caeoma Scorodizon Schlecht. oer Berol, 2: 118, 1824. 
Caeoma alliorum Link, in Willd. Sp. Pl. 6?: 7. 1825. 
Erysibe limbate alliorum Wallr. Fl. Crypt. Germ. 2:195. 1833. 
Erysibe appendiculata alliorum Wallr. Fl. Crypt. Germ. 2:210. 1833. 
Uredo areolata Rab. Deutsch!. Krypt.-Fl. 1:9. 1844. 
Uromyces alliorum Lév. Ann. Sci. Nat. III. 8: 375, 1847. 
Puccinia mixta Fuckel, Symb. Myc. 58. 1869. 
Puccinia Porri Wint. in Rab. Krypt.-Fl. 2: 200. 1881. 
Uromyces durus Dietel, Ann. Myce. 5:70. 1907. 
O. Pycnia amphigenous, scattered among the aecia, depressed, becoming brownish, 
globoid, 60-90 » wide by 55-80 u high; ostiolar filaments rarely protruding. 
J, Aecia amphigenous, gregarious on yellow spots, short-cylindric, 0.2-0.4 mm. in dia- 
meter; peridium whitish, the margin recurved, lacerate; peridial cells 16-21 by 27-32 u, over- 
lapping, the outer wall transversely striate, rather thick, 7-9 u, the inner wall thinner, 3-5 yp, 
verrucose; aeciospores globoid or angular, 18-20 by 19-26; wall yellow, 1-2.» thick, 
finely verrucose. 
II. Uredinia amphigenous, many, scattered, oval or oblong, rather small, 0.2-0.4 by 
0.3-0.7 mm., early naked, pulverulent, yellowish, ruptured epidermis conspicuous; uredinio- 
spores broadly ellipsoid or globoid, 20-24 by 23-29 u; wall yellow, rather thin, 1-2 p, finely 
echinulate, the pores 8-10, scattered. 
