436 NORTH AMERICAN FLORA [VoLUME 7 
I. Aecia amphigenous, numerous, gregarious in round, oblong, or irregular groups, on 
brownish-red or purplish spots 1-8 mm. in length, cupulate, 0.3-0.4 mm. in diameter; peridium 
whitish, the margin recurved, entire or lacerate ; peridial cells rhomboidal, 15-20 by 35-45 p, 
overlapping, the outer wall rather thin, 2~5 u, almost smooth, the inner wall thicker, 5-9 u, 
coarsely verrucose; aeciospores ellipsoid, globoid, or angular, 13-19 by 17-23 u; wall colorless, 
thin, 1~1.5 », minutely verrucose. 
II. Uredinia amphigenous, numerous, scattered, roundish or irregular, small, 0.1-0.3 by 
0.1-0.5 mm., early naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; 
urediniospores broadly ellipsoid or obovoid, 15-20 by 17-22 »; wall cinnamon-brown, thin, 
1-1.5 », moderately echinulate, the pores 2, rarely 3, approximately equatorial. 
III. Telia amphigenous, numerous, scattered, roundish, oval, or irregular, rather small, 
0.1-0.5 by 0.1-0.8 mm., early naked, pulverulent, chocolate-brown, ruptured epidermis at 
first noticeable, later lacking; teliospores ellipsoid or globoid, 17-26 by 24-33 u, rounded at 
both ends, slightly or not constricted at septum; wall chestnut-brown, uniformly and mod- 
erately thick, 1.5—-2 u, inconspicuously verrucose, the pore of the upper cell apical or subapical, 
the pore of the lower cell midway between the pedicel and the septum; pedicel hyaline, short 
or deciduous, often placed obliquely. 
On CICHORIACEAE: 
Lapsana communis L., New York, Oregon; Ontario. 
Type Locality: Near Stargard, Mecklenburg-Strelitz, Germany, on Lapsana communis. 
DistrRisurion: Western New York to Southern Ontario, probably introduced locally into North 
America; also in Europe. 
ILLusrrations: Beitr. Krypt. Schweiz f. 159; Ber. Deuts. Bot. Ges. 11: gl. 21; Jour. Bot. 2: 
pl. 14, f. 2; Krypt.-fl. Brand. Pilze 3: f. B55. 
Exsiccati: Barth. Fungi Columb. 4269; Barth. N. Am. Ured. 1352. 
262. Dicaeoma ( ? ) Harknessii (Vize) Kuntze, Rev. 
Gen. 33: 469. 1898. 
Puccinia Harknessii Vize, Grevillea 7: 11. 1878. 
Puccinia cladophila Peck, Bot. Gaz. 4:127. 1879. 
Dicaeoma cladophilum Kuntze, Rev. Gen. 33: 468. 1898. 
Puccinia Ptiloriae Bubak, Jour. Myc. 12: 52. 1906. 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, caulicolous, rather numerous, scattered or more often grouped 
in longitudinal patches, occasionally confluent, round or elliptic, 0.2-1.5 mm. across, tardily 
naked, finally uncovered by longitudinal splitting of the epidermis, pulverulent, dark cinna- 
mon-brown, ruptured epidermis very conspicuous; urediniospores broadly ellipsoid, obovoid, 
or globoid, 19-26 by 23-29 u; wall cinnamon-brown, 1-1.5 » thick, closely and finely echinu- 
late, the pores 2, superequatorial. 
III. Telia amphigenous, caulicolous, very numerous, usually scattered on leaves but 
occasionally closely grouped or confluent, on stems for the most part confluent in large patches, 
round or elliptic, 0.2-1 mm. across, rather early naked, pulvinate, becoming somewhat pulveru- 
lent, blackish-brown, ruptured epidermis noticeable; teliospores ellipsoid or oblong-ellipsoid, 
19-26 by 32-45 wu, rounded above, rounded or slightly narrowed below, slightly constricted at 
septum; wall chestnut-brown, 2-3 » thick, uniform, very finely and closely verrucose; pedicel 
hyaline, fragile, deciduous, two to three times length of spore. 
On CICHORIACEAE: 
Lygodesmia texana (T. & G.) Greene (L. aphylla T. & G.), Texas. . 
Pletacanthus spinosus (Nutt.) Rydb. (Lygodesmia spinosa Nutt.), California, Oregon ( ? ), 
Nevada. 
Ptilovia exigua (Nutt.) Greene (Stephanomeria exigua Nutt.), California. 
Ptiloria lactucina (A. Gray) Greene, ( Stephanomeria lactucina A. Gray), California. 
Ptiloria myrioclada (D. C. Eaton) Greene (Stephanomeria myrioclada D. C. Eaton), 
daho. 
Ptiloria neomexicana Greene, New Mexico. . 
Ptiloria paniculata (Nutt.) Greene (Stephanomeria paniculata Nutt.), Oregon, Washington. 
Piiloria pauciflora (Torr.) Raf. (Stephanomeria runcinata Nutt.), Arizona, Montana. 
Ptiloria ramosa Rydb., Colorado, Montana. 
Piiloria tenuifolia (Torr.) Raf. (Stephanomeria minor Nutt.), Colorado, Montana, Nevada, 
Utah, Washington. . : 
TyPE LOCALITY: Sierra Nevada, California, on Lygodesmia sp. 
