Part 4, 1920] AECIDIACEAE 305 
On POACEAE: 
Sporobolus contractus Hitche. (S. strictus Merr. not Franchet), Colorado, New Mexico. 
Sporobolus cryptandrus (Torr.) A. Gray, Colorado, Kansas, Montana, Nebraska, New Mex- 
ico, Oklahoma, South Dakota, Texas, Wyoming. 
Sporobolus Wrightii Munro, Arizona. 
Tridens strictus (Nutt.) Nash, Texas. 
TYPE LOCALITY: Colorado, on ‘' Vilfa,”’ now determined as Sporobolus cryptandrus. 
DistRiBution: Plains from Montana southward to Arizona and Texas. 
InLustRaTIon: Bull. Lab. Nat. Hist. Univ. Iowa 4: pl. 6, f. 24a. 
Exsiccati: Arth. & Holway, Ured. Exs. Ic. 24a; Barth. Fungi Columb. 3550, 4847; Barth. N. 
Ere 32, 541, 2035; Ellis & Ev. Fungi Columb. 1378; D. Griff. W. Am. Fungi 90, 255; Sydow, 
47. Dicaeoma luxuriosum (Sydow) Arthur & Fromme. 
Puccinia tosta luxurians Arth. Bull. Torrey Club 29: 229. 1902. 
Puccinia luxuriosa Sydow, Monog. Ured. 1: 812. 1904. 
O. Pycnia amphigenous, in small groups, crowded, punctiform, honey-yellow becoming 
dark-brown, flask-shaped or globoid in vertical section, 80-90 » broad by 100-110 4 high; 
ostiolar filaments agglutinate. 
I. Aecia amphigenous, frequently in small irregular groups or solitary, cylindric, usually 
short, 0.2-0.4 mm. high, 0.2-0.3 mm. broad; peridium yellowish-white, becoming irregularly 
lacerate; peridial cells rectangular or rhombic, 21-27 by 24-39 n, slightly overlapping, the 
outer wall 9-13 « thick, transversely striate, the inner wall 2-3 u thick, very closely and notice- 
ably verrucose; aeciospores broadly ellipsoid or oblong, 18-23 by 22-32 u; wall thin, 1-2 u, 
rarely thicker, very closely and inconspicuously verrucose. 
On CHENOPODIACEAE: . 
Sarcobatus vermiculatus (Hook.) Torr., Colorado, Nevada, New Mexico. 
II. Uredinia mostly epiphyllous, few, scattered, oblong-linear, 0.5-1 mm. long, early 
naked, cinnamon-brown, ruptured epidermis inconspicuous; urediniospores ellipsoid or oblong, 
19-24 by 26-32 u; wall pale cinnamon-brown, 1.5—2 « thick, finely and closely echinulate, the 
pores 6~8, scattered or often restricted to the equatorial zone. 
III. Telia mostly epiphyllous, numerous, crowded and often confluent, oblong or linear, 
0.5-3 mm. long, pulvinate, blackish-brown, early naked, ruptured epidermis inconspicuous; 
teliospores oblong or broadly ellipsoid, 18-28 by 40-61 »; wall dark chestnut-brown, 1.5-2 » 
thick, thickened at apex, 5-12 4, rourfded or acute above, rounded or tapering below; pedicel 
tinted, once or twice length of spore. 
ON PoacEAE: 
Sporobolus airoides Torr., Arizona, Colorado, Idaho, Montana, Nebraska, Nevada, New 
Mexico, Oklahoma, Oregon. 
Type Locality: Andrews, Oregon, on Sporobolus airoides. 
DISTRIBUTION: Montana to Oregon, and southward to Oklahoma, New Mexico, and Nevada. 
Exsiccatr: Barth. Fungi Columb. 4374; Barth. N. Am. Ured. 1059, 1257, 1949, 1950, 1951; 
D. Griff. W. Am. Fungi 304, 304c. 
48. Dicaeoma Sarcobati (Peck) Arth. Résult. Sci. Congr. Bot. 
Vienne 344. 1906. 
Aecidium biforme Peck; Parry, Am. Nat. 9: 351. 1875. Not Dicaeoma biforme Kuntze, 1898. 
Aecidium Sarcobati Peck, Bot. Gaz. 6: 240. 1881. 
?Aecidium isomerinum Peck, Bull. Torrey Club 10:75. 1883. 
Peridermium gracile Hark. Bull. Calif. Acad. 1:36. 1884. 
Aecidium Heliotropii Tracy & Gall. Jour. Myc. 4:21. 1888. 
Aecidium Ellisii Tracy & Gall. Jour. Myc. 4:21. 1888. 
Aecidium Lepidii Tracy & Gall. Jour. Myc. 4:21. 1888. 
Aecidium Fumariacearum Kellerm. & Swingle, Jour. Myc. 4:95. 1888. 
Puccinia Buchloés Schof.; Webber, Ann. Rep. Neb. Board Agr. 1889: 68. 1890. 
Aecidium Corydalis Webber, Ann. Rep. Neb. Board Agr. 1889: 70. 1890. 
Aecidium Cleomis Ellis & And. Bot. Gaz. 16:48. 1891. 
Puccinia vexans Buchloés Webber; Sacc. Sy!l. Fung. 9: 308. 1891. 
Puccinia Aristidae Tracy, Jour. Myc. 7: 281. 1893. 
Puccinia subnitens Dietel, Erythea 3:81. 1895. 
Dicaeoma Aristidae Kuntze, Rev. Gen. 33: 467. 1898. 
Aecidium Triglochinis Dietel & Holway; Holway, Erythea 7:98. 1899. 
Aecidium caspicum Jacz. Hedwigia Beibl. 39: 133. 1900. 
Dicaeoma Buchloés Arth. Résult. Sci. Congr. Bot. Vienne 344. 1906. 
Aecidium Cockerellii Arth.: Standley, Mycologia 8: 150. 1916. 
