Part 6, 1921] AECIDIACEAE 435 
Cacalia calotricha Blake, Guatemala. 
Cacalia Pringlei S. Wats., Jalisco. 
Cacalia obtustloba Rob. & Greenm. Michoacan, Morelos. 
Cacalia sinuata Cerv., Michoacan. 
Senecio angulifolius DC., Hidalgo, Mexico (state), Oaxaca. 
Senecio petasioides Greenman, Guatemala. 
Senecio sinuatus H.B.K., Hidalgo. 
Senecio Warszewiczii Braun & Bouché, Guatemala. 
TYPE LOCALITY: Amecameca, Mexico, on Senecio angulifolius. 
DISTRIBUTION: Southern Mexico southward into Guatemala. 
Exsiccatr: Barth. Fungi Columb. 3861, 4974, 5070; Barth. N. Am. Ured. 60, 169, 366, 469, 
1268, 1369; Sydow, Ured. 2385. 
260. Dicaeoma Cnici (H. Mart.) Arth. Résult. Sci. 
Congr. Bot. Vienne 344. 1906. 
Puccinia Cnici H. Mart. Fl. Mosq. 226. 1817. 
Puccinia Cirsii-lanceolati Schroet.; Cohn, Krypt.-Fl. Schl. 31: 317. 1887. 
Dicaeoma Cirsii-lanceolati Kuntze, Rev. Gen. 33: 468. 1898. 
Aecidium Kabatianum Bub4k, Sitz.-ber. Bohm. Ges. Wiss. 189919: 10. 1899. 
Gymnoconia Cirsti-lanceolati Bubdk, Sitz.-ber. Bohm. Ges. Wiss. 189919: 10. 1899. 
Puccinia Cirsii-eriophori Jacky, Zeits. Pflanzenkr. 9: 275. 1899. 
Jackya Cirsii-lanceolati Bubak, Oesterr. Bot. Zeits. 52:42. 1902. 
Jackya Cirsii-eriophori Bubak, Oesterr. Bot. Zeits. 52:42. 1902. 
Aecidium Cirsii-lanceolati Kellerm. Jour. Myc. 9: 229. 1903. 
O. Pycnia epiphyllous, crowded in small groups 1—2 mm. in diameter, rather inconspicuous, 
honey-yellow becoming light-brown, globoid, 160-350 « in diameter ; ostiolar filaments short, 
not projecting beyond the ostiole; pycniospores ovoid, about 3 by 4p. 
I. Aecia mostly hypophyllous, solitary or loosely grouped in spots 3-8 mm. across, glo- 
boid, 0.5-1 mm. in diameter, long covered by the overarching epidermis, finally opening by 
a central pore or slit; peridium wanting or represented by a few isolated aeciospore-like cells; 
aeciospores globoid or ellipsoid, 20-27 by 25-35 4; wall colorless, thick, 2-3 u, closely and 
distinctly verrucose. 
II. Uredinia amphigenous or caulicolous, scattered, round or oblong, 0.3-1.5 mm. across, 
early naked, pulverulent, dark cinnamon-brown, ruptured epidermis conspicuous; uredinio- 
spores ellipsoid or obovoid, 23-29 by 27-35 x; wall cinnamon-brown, 1.5—3 mu thick, moderately 
and prominently echinulate, the pores usually 3, rarely 2 or 4, equatorial, covered by the 
swollen cuticle in the form of bullate swellings, 12-19 » across and 1-3 yp thick. 
III. Telia amphigenous, scattered, round, 0.3-0.8 mm. in diameter, early naked, pulveru- 
lent, chestnut-brown, ruptured epidermis rather conspicuous; teliospores ellipsoid or oblong, 
20-29 by 32-45 wu, rounded or obtuse above, rounded or slightly narrowed below, slightly or not 
constricted at septum; wall chestnut-brown, 1.5-3 u thick, slightly thickened into a low umbo 
over the pores, 3-7 u, closely and minutely verrucose appearing smooth when wet; pedicel 
colorless, fragile, about as long as spore. 
On CaRDUACESE: ; 
Cirsium lanceolatum (L.) Hill (Cnicus lanceolatus Willd.), Colorado, Deleware, Idaho, 
Indiana, Iowa, Maine, Massachusetts, Michigan, Montana, New Jersey, New York, 
Ohio, Oregon, Pennsylvania, Rhode Island, Utah, Washington, West Virginia, 
Wisconsin; British Columbia, Ontario. 
TYPE LOCALITY: Near Moscow, Russia, on Cnicus lanceolatus. . 
DIstRiBurion: Northern United States and adjacent Canada; also in Europe. . 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 22: f. 153, 154; Krypt.-fil. Brand. Pilze 3: f. B51; Zeits. 
Pf kr. 9: p. 275, f. 1, p. 277, f. 2. 
coe ers Fungi Claes: 3168, 3253, 4353, 5053; Barth. N. Am. Ured. 423, 831, 832, 
1228, 1432, 1835, 1938, 2236; Garrett, Fungi Utah. 68; Kellerm. Ohio Fungi 128; Seym. & Earle, 
Econ. Fungi 307a, 6; Sydow, Ured. 1911. 
261. Dicaeoma Lapsanae (Schultz) Kuntze, Rev. 
Gen. 3’: 469. 1898. 
Aecidium Lapsanae Schultz, Prodr. Fl. Stargard. 454. 1806. 
Dead oe Lapsanae Purton; Cooke, Jour. Bot. 2: 38. 1864. 
Trichobasis Lapsanae Cooke, Micr. Fungi ed. 4. 224. 1865. 
Puccinia Lapsanae Fuckel, Symb. Myc. 53. 1869. 
O. Pycnia amphigenous, gregarious in round or irregular groups with the aecia, notice- 
able, honey-yellow becoming brownish, conic-globoid, 60-110 4 in diameter by 60-80 z high; 
ostiolar filaments 20-35 yu long. 
