280 NORTH AMERICAN FLORA [VoLUME 7 
On PoackaE: 
Andropogon furcatus Muhl. (A. provincialis furcatus Hack., A. provincialis Am. Auth. not 
ere Colorado, Kansas, Minnesota, Nebraska, North Dakota, Oklahoma, South 
akota. 
ae ry ot cla Nebraska, North Dakota. 
vipsacum dactyloides L,. . monostachyum Willd.), Kansas, Maryland, ississippi, 
Nebraska, North Carolina. 2 d ee Sree 
Tripsacum lanceolatum Rupr., Jalisco, Mexico (state). 
TYPE LOcALIty: Manhattan, Kansas, [on Ceanothus ovatus}. 
_ DistRrution: Maryland to North Dakota, and southward to Mississippi and southern Mexico, 
chiefly on the plains of the Mississippi valley. 
Inwustration: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 1, f. 35a. 
Exsiccatr: Arth. & Holway, Ured. Exs. Ic. 35a; Barth. Fungi Columb. 2265, 2756, 3459; Barth. 
N. Am. Ured. 122, 422, 734, 1141, 1536, 1748, 2053; Brenckle, Fungi Dak. 42; Carleton, Ured. 
Am, 12; Ellis, N. Am. Fungi 1428; Ellis & Ev. Fungi Columb. 1387; Sydow, Ured. 1729, 2072. 
5. Dicaeoma virgatum (Ellis & Ev.) Kuntze, Rev. Gen. 3?: 471. 
1898. 
Caeoma Andropogi Schw. Trans. Am. Phil. Soc. II. 4: 290. 1832. Not Dicaeoma Andropogonis 
Kuntze, 1898. 
Puccinia virgata Ellis & Ev. Proc. Acad. Phila. 1893: 154. 1893. 
Puccinia clavispora Elis & Barth. Erythea 4:79. 1896. 
Uredo alabamensis Dietel; Atk. Bull. Cornell Univ. 3:22, 1897. 
O and I. Pycnia and aecia unknown. ; 
II. Uredinia amphigenous, crowded and often confluent, narrowly oblong or linear, 
1-3 mm. long, early naked, chestnut-brown, ruptured epidermis conspicuous; paraphyses 
numerous, clavate or sometimes capitate, 19-23 by 55-804, straight or curved, the wall 
cinnamon- or chestnut-brown, 2-3 » thick, 5-9 » at apex, smooth; urediniospores obovoid, 
oblong or ellipsoid, 21-31 by 26-42 4; wall chestnut-brown above, paler below, 2-3 yw thick, 
usually thicker at apex, 3-5 uw, moderately verrucose, the pores 4, equatorial. 
III. Telia amphigenous, crowded and ‘often confluent, oblong or linear, 1-5 mm. long, 
early naked, blackish-brown, ruptured epidermis conspicuous; teliospores oblong or oblong- 
clavate, 18-26 by 48-60 », rounded or truncate at apex, narrowed at base, slightly constricted at 
septum, which is above the middle; wall dark chestnut-brown above, paler below, 1.5-2 u 
thick, moderately thickened at apex, 5-10 uw; pedicel thick, very short, concolorous, or darker 
than the base of the spore. 
On PoacEaE: : 
Andropogon condensatus H.B.K. (Schizachyrium condensatum Nees), Veracruz. 
Sorghastrum incompletum (Presl) Nash (Andropogon incompletus Presi), Jalisco, Morelos. 
Sorghastrum nutans (L.) Nash (Andropogon nutans L., A. avenaceus Michx., Sorghum 
nutans A. Gray, Chrysopogon avenaceus Benth.), Alabama, Colorado, Florida, Georgia, 
Kansas, Mississippi, Nebraska, North Carolina, Oklahoma, Pennsylvania, South 
Carolina, Texas. . 
Type LocaLity: Rooks County, Kansas, on “ Panicum virgatum,” error for Sorghastrum nutans. 
DISTRIBUTION: Southern Pennsylvania to Colorado, and southward to Florida, Texas, and 
southern Mexico. 
IuLustrations: Bull. Lab. Nat. Hist. Univ. Iowa 5: 177, 178, f. 3, 4, 5; pl. 1, f. 37a. 
Exsiccatr: Arth. & Holway, Ured. Exs. Ic. 37a; Barth. Fungi Columb. 2677, 2971, 3374; Barth. 
N. Am. Ured. 73, 2079; Ellis & Ev. N. Am. Fungi 2888, 3476; Ellis & Ev. Fungi Columb. 985; Seym. 
& Earle, Econ. Fungi 535; Sydow, Ured. 1066, 2081. 
6. Dicaeoma Mariae-Wilsoni (Peck) Arthur & Fromme. 
Aecidium Mariae-Wilsoni Peck, Ann. Rep. N. Y. State Mus. 24:92. 1872. 
Puccinia Ellisiana Thitm. Bull. Torrey Club 6: 215. 1878. 
Puccinia americana Lagerh. Tromsé Mus. Aarsh. 17: 45. 1895. 
Dicaeoma Ellisianum Kuntze, Rev. Gen. 3%: 468. 1898. 
O. Pycnia epiphyllous, few, in small groups on pale, discolored spots, inconspicuous, 
honey-yellow, globose or somewhat conic in longitudinal section, 60-80 » in diameter; osti- 
olar filaments about 50 yw long. 
I. Aecia hypophyllous, in crowded, circular groups, on pale discolored spots, 2-3 mm. 
across, cupulate or short-cylindric, small, 0.2-0.3 mm. in diameter; peridium colorless, the 
margin erose and slightly recurved; peridial cells rhomboidal in longitudinal section, 12-18 u 
broad by 15-21 » long, overlapping, the outer wall thick, 5-9 u, transversely striate, smooth, 
the inner wall much thinner, 2-3 u, moderately verrucose; aeciospores globoid or sometimes 
ellipsoid and angular from compression, small, 12-16 by 14-19 y; wall thin, I-1.5 u, light-yellow, 
finely and minutely verrucose. 
