Part 6, 1921] AECIDIACEAE 437 
DISTRIBUTION: The semiarid region of the mountains from Washington and Montana to 
southern California and central Texas. 
_ Exsiccati: Barth. Fungi Columb. 4665; Barth. N. Am. Ured. 1153, 1447, 1653, 1758, 1943; 
Ellis & Ev. Fungi Columb. 1646; Ellis & Ev. N. Am. Fungi 1839; Ellis, N. Am. Fungi 1446; D. Griff. 
Ne wr ag 396, 396a-d; Rab.-Wint. Fungi Eur. 3814; Rab.-Wint.-Paz. Fungi Eur. 4019; Sydow, 
red, : 
263. Dicaeoma ( ? ) Stephanomeriae (Sydow) Arthur. 
Puccinia Stephanomeriae Sydow, Monog. Ured. 1: 157. 1902. 
O and I. Pycnia and aecia unknown. 
II. Uredinia mostly epiphyllous, few, scattered, round, 0.1-0.3 mm. in diameter, rather 
tardily naked, pulverulent, dark cinnamon-brown, ruptured epidermis conspicuous; uredi- 
niospores broadly ellipsoid, obovoid, or globoid, 23-29 by 29-35 u; wall light chestnut-brown, 
1.5—2.5 » thick, moderately and very strongly echinulate, the pores 2, approximately equatorial. 
Ill. Telia amphigenous and caulicolous, numerous, scattered or frequently circinating, 
1-2.5 mm. across, round, 0.1-1 mm. in diameter, rather early naked, pulvinate, becoming 
pulverulent, chestnut- or blackish-brown, ruptured epidermis evident; teliospores ellipsoid or 
obovoid-ellipsoid, 21-29 by 35-45 », rounded above, rounded or slightly narrowed below, 
slightly or not constricted at septum; wall chestnut-brown, 2-3 » thick, uniform, finely verru- 
cose; pedicel colorless, up to 85 uw long, deciduous. 
On CICHORIACEAE: 
Ptiloria cichoriacea (A. Gray) Greene (Stephanomeria cichoriacea A. Gray), California. 
Ptiloria pleurocarpa Greene, California. 
E LOCALITY: San Gabriel Mountains, California, on Siephanomeria cichoriacea. 
Distrreurion: Known only from the type locality and vicinity. 
Exsiccati: Barth. N. Am. Ured. 264. 
264. Dicaeoma variabile (Grev.) Kuntze, Rev. 
Gen. 33: 471. 1898. 
Puccinia variabilis Grev. Scot. Crypt. Fl. pl. 75. 1823. : 
Aecidium Taraxact Grev. Fl. Edinb. 444. 1824, Not A. Taraxaci Kunze & Schmidt, 1816. 
Aecidium Grevillet Grove, Jour. Bot. 23: 129. 1885. 
O. Pycnia not seen. 
I. Aecia hypophyllous or sometimes amphigenous, scattered over large areas or solitary, 
loosely gregarious or rarely gregarious on discolored spots, often associated with or opposite 
uredinia or telia, cupulate, rather small, 0.2-0.3 mm. in diameter; peridium white, the margin 
recurved, lacerate; peridial cells narrowly rhomboidal, 10-20 by 25-45 yu, loosely overlapping, 
the outer wall thin, 2-4 u, smooth, the inner wall thicker, 4-8 4, verrucose; aeciospores globoid, 
ellipsoid or polygonal, 13-20 by 16-25 y; wall colorless, thin, 1 4, minutely verrucose. 
II. Uredinia amphigenous, scattered, roundish, small, 0.1-0.3 mm. in diameter, loosely 
but rather long covered by the membranous epidermis, pulverulent, ruptured epidermis 
evident; urediniospores ellipsoid, globoid, or ovoid, 16-24 by 20-28 u; wall cinnamon-brown, 
moderately thick, 1.5-2 u, closely echinulate, the pores 2 or 3, approximately equatorial. 
JII. Telia amphigenous, scattered, or confluent on yellowish or purplish spots, often with 
the uredinia, roundish, oval, or irregular, rather small, 0.1-0.3 by 0.1-0.6 mm., early naked, 
pulverulent, blackish- or chestnut-brown, ruptured epidermis noticeable; teliospores ellip- 
soid or oblong, 18-24 by 21-30, usually rounded at both ends, slightly or not constricted 
at septum; wall chestnut-brown, moderately thick, 1.5-2 u, occasionally thickened at apex 
up to 3-44, inconspicuously verrucose; pedicel hyaline, fragile, short, 3-4 w, often placed 
obliquely. 
CEAE: ; 
i Ppa per L. (Taraxacum oficinale Weber, T. Taraxacum Karst.), Nova Scotia. 
TypE LOCALITY: Near Edinburgh, ele o- ae BC seats 
TION: Sparingly introduced in Nova Scotia; also in Europe. 
Re eRe cali Krypt. Schweiz 21: 7. 158; Corda, Ic. Fung. 4: pl. 5, f. 64; Krypt.-fl. 
Brand. Pilze 3: f. B57. 
265. Dicaeoma Orbicula (Peck & Clinton) Kuntze, 
Rev. Gen. 33: 469. 1898. 
ini i i ; Mus. 30: 53. 1879. 
Puccinia Orbicula Peck & Clinton; Peck, Rep. N. Y. State 
a Prenanthis-racemosae Sydow, Monog. Ured. 1: 137. 1902. 
