Part 4, 1920] AECIDIACEAE 321 
Asclepias speciosa Torr. (A. Douglasii Hook.), Kansas, Nebraska, South Dakota. 
ge re syriaca I,. (A. Cornutt Decaisne), Illinois, Indiana, Iowa, Missouri, Nebraska, 
isconsin. 
Asclepias tuberosa L., Iowa, Kansas, Oklahoma. 
Asclepias verticillata L,., Colorado, Nebraska. 
Asclepiodora decumbens (Nutt.) A. Gray, Oklahoma, Texas. ; 
Asclepiodora viridis (Walt.) A. Gray (Asclepias viridis Walt.), Kansas, Oklahoma. 
Philibertella Hartwegii Vail (Philibertia linearis A. Gray), Chihuahua. 
Philibertella Hartwegii heterophylla (Engelm.) Vail, Arizona. 
II. Uredinia chiefly epiphyllous, few, elliptic, 0.5-1 mm. long, early naked, pale cinnamon- 
brown, pulverulent, ruptured epidermis not evident; urediniospores globoid or broadly ellip- 
soid, 16-23 by 18~26 yu; wall pale-yellow or colorless, 1.5-2 » thick, finely and closely verrucose- 
echinulate, the pores obscure, probably 4-8, scattered. 
IIl. Telia chiefly epiphyllous, numerous, crowded, elliptic, 0.5-1 mm. long, early naked, 
pulvinate, dark chocolate-brown, ruptured epidermis not apparent; teliospores broadly ellip- 
soid or oblong, 19~24 by 29-42 u, usually rounded at both ends, or sometimes obtuse above and 
narrowed below, slightly constricted at septum; wall chestnut-brown, 1.5—2 » thick, moderately 
thickened above, 5-9 4, smooth; pedicel golden-brown, once or twice length of spore or some- 
times more, occasionally attached at an angle. 
On PoacEsE: 
Bouteloua barbata Lag. (B. microstachya Dewey), Texas. 
Bouteloua curtipendula (Michx.) Torr. (B. racemosa Lag., Atheropogon curtipendulus Fourn.), 
Arizona, Iowa, Kansas, New Mexico, Oklahoma, Texas. 
Bouteloua filiformis (Fourn.) D. Griff. (Atheropogon filiformis Fourn.), Guatemala. 
Bouteloua gracilis (H.B.K.) Lag. (B. ol¢gostachya Torr.), Arizona, Colorado, Kansas, Mon- 
tana, Nebraska, North Dakota, South Dakota, Texas. 
Bouteloua hirsuta Lag., Nebraska. 
Leptochloa dubia (H.B.K.) Nees (Diplachne dubia Benth.), Texas; Hidalgo. 
Type Locatrty: Colorado, on Asclepias verticillata. 
DistRiBUTION: Wisconsin to Montana southward to Texas and Arizona, and sparingly through 
Mexico and Central America. 
ILLUSTRATIONS: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 9, f. 59a-e. 
Exsiccatr: Arth. & Holway, Ured. Exs. Ic. 59a-e; Barth. Fungi Columb. 2766, 4140, 4953; 
Barth. N. Am. Ured. 420, 620, 821, 928, 1028, 1531; Brenckle, Fungi Dak. 183; Carleton, Ured. Am. 
32; Clements, Crypt. Form. Colo. 548; Ellis, N. Am. Fungi 1012; Ellis & Ev. Fungi Columb. 556, 
865, 1569, 1603, 1965, 2061, 2062; Ellis & Ev. N. Am. Fungi 2225 in part, 2990, 3349; D. Griff. 
W. Am. Fungi 269; Sydow, Ured. 1061, 2112. 
68. Dicaeoma Leptochloae Arthur & Fromme. 
Puccinia Leptochloae Arth. & Fromme, Torreya 15: 263. 1915. 
O and I. Pyenia and aecia unknown. 
II. Uredinia amphigenous, oval, oblong, or linear, early naked, pulverulent, ruptured 
epidermis inconspicuous; urediniospores globoid, 21-24 by 23-26 u; wall light cinnamon-brown, 
moderately thick, 2-2.5 », minutely and closely verrucose, the pores usually 4, sometimes 6, 
scattered. 
III. Telia amphigenous, crowded, oval, oblong or linear, 0.5—2 mm. long, early naked, 
pulverulent, pulvinate, blackish-brown, ruptured epidermis inconspicuous; teliospores oblong 
or broadly ellipsoid, 21-27 by 26-35 u, both ends rounded, scarcely constricted at septum; 
wall dark chestnut-brown, about 2 u thick, 3-7 « above; pedicel golden, as long as spore. 
On POACEAE: : 
Leptochloa filiformis (Lam.) Beauv. (L. mucronata pulchella Scribn.) Texas; Sonora; Porto 
TYPE one Guaymas, Mexico. 
DIstRIBUTION: Southern Texas westward to the Gulf of California, and in Porto Rico; also in 
South America. 
69. Dicaeoma kansense (Ellis & Barth.) Arth. Résult. Sci. 
Congr. Bot. Vienne 344. 1906. 
Puccinia kansensis Ellis & Barth. Erythea 4:1. 1896. 
O and I. Pyenia and aecia unknown. 
Il. Uredinia mostly epiphyllous, few, scattered, linear or sub-linear, very small, 0.2- 
0.3 mm. long, early naked, mostly superficial, ruptured epidermis conspicuous; urediniospores 
globoid or broadly ellipsoid, small, 14-18 by 19-21 uw; wall colorless, 1.5—-2 » thick, finely and 
closely echinulate, the pores rather indistinct, at least 6, scattered. 
