322 NORTH AMERICAN FLORA [VoLumME 7 
III. Telia oblong or linear, scattered, sometimes confluent, small, 0.3-0.5: mm. long, 
early naked, mostly superficial, chocolate-brown, ruptured epidermis conspicuous; teliospores 
oblong or elliptic, 16-20 by 23-30 », both ends rounded, slightly constricted at septum; wall 
dark chestnut-brown, 1.5~2 yu thick, scarcely or not at all thickened at apex; pedicel nearly 
colorless, fragile, rarely as long as spore. 
On PoacEaE: 
Bulbilis dactyloides (Nutt.) Raf. (Buchloé dactyloides Engelm.), Kansas, Nebraska. 
TyPz LocaLIty: Rooks county, Kansas, on Buchloé dactyloides. 
DISTRIBUTION: Central Kansas to central Nebraska. 
IuLustraTIon: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 9, f. 60a. 
Exsiccatt: Arth. & Holway, Ured. Exs. Ic. 60a; Barth. Fungi Columb. 2664, 3358; Barth. N. 
Am. Ured. 151; Ellis & Ev. Fungi Columb. 869; Ellis & Ev., N. Am. Fungi 3351; Seym. & Earle, 
Econ, Fungi Suppl. B13; Sydow, Ured. 1073. 
70. Dicaeoma rubellum (Pers.) Arthur & Fromme. 
Aecidium rubellum Pers. in J. F. Gmel. Syst. Nat. 2: 1473. 1791. 
Aecidium Rumicis Hoffm. Deuts. Fl. 2: opp. pl. 11. 1795. 
Uredo Phragmitis Schum. Enum. PI. Saell. 2: 231. 1803. 
Puccinia arundinacea Hedw.; Poir. in Lam. Encyc. 8: 250. 1808. 
Uredo striola Strauss, Ann. Wett. Ges. 2: 105. 1810. 
Uredo rubella Spreng. Syst. Veg. 4: 572, in part. 1827. 
Puccinia Phragmitis Korn. Hedwigia 15: 179. 1876, 
Puccinia Trailii Plowr. Brit. Ured. 176. 1889. 
Dicaeoma Phragmitis Kuntze, Rev. Gen. 33: 470. 1898. 
Puccinia rubella Arth. Bot. Gaz. 34:15. 1902. 
Puccinia Aecidii-Rumicis Liro, Acta Soc. Faun. Fl. Fenn. 298: 10. 1906. 
O. Pycnia amphigenous, in small circular groups, crowded, inconspicuous, submerged, 
globoid in vertical section, 80-110 » in diameter; ostiolar filaments 30-50 p long. 
I. Aecia hypophyllous, in large circular groups, 3-12 mm. in diameter, on purple-red, 
somewhat swollen spots, surrounding the pycnia, cupulate, small, 0.2-0.3 mm. in diameter; 
peridium colorless or pale-yellow, low, the margin recurved and finely lacerate; peridial cells 
broadly oblong or quadratic, 19-26 by 26-40 p, abutted or slightly overlapping, the outer 
wall thick, 7-12 », smooth, the inner wall 2—4 », coarsely and strongly verrucose, with promi- 
nent, irregular tubercles; aeciospores globoid or oblong, 15-19 by 18-23 yz; wall colorless or 
nearly so, 2-4 » thick, irregularly and unevenly verrucose. 
On POLYGONACEAE: 
Rheum rhaponticum L,., Nebraska. 
Rumex altissimus Wood, Nebraska. 
Rumex Britannica L. (R. orbiculatus A. Gray), Nebraska. . 
Rumex mexicanus Meisn, (R. salicifolius Hook.), North Dakota; Manitoba. 
Rumex occidentalis S. Wats., Manitoba. 
Rumex venosus Pursh, Oklahoma. 
II. Uredinia amphigenous, scattered, prominent, oblong, 0.5~-1 mm. long, cinnamon- 
brown, surrounded by discolored host-tissue, pulverulent, ruptured epidermis inconspicuous; 
urediniospores oblong-ellipsoid or obovoid, 18-21 by 29-34 4; wall cinnamon-brown, thick, 
3-4 yu, prominently echinulate, the pores 4, equatorial. 
III. Telia amphigenous, scattered, prominent, oblong or broadly ellipsoid, 0.5-1 mm. 
long, chocolate-brown, early naked, prominently pulvinate, ruptured epidermis usually incon- 
spicuous; teliospores oblong, 16-21 by 45-64 uw, rounded or acute above, capped by a hyaline 
umbo, rounded or tapering below, moderately or considerably constricted at septum; wall 
smooth, cinnamon-brown, 2-3 4 thick, somewhat thicker above, 4-7 u; pedicel firm, often 
persistent, pale-yellow, very long, two to four times as long as spore. 
On PoackakE: . . 
Phragmites Phragmites (L,.) Karst. (P. communis Trin.), Colorado, Connecticut, Delaware, 
I!linois, Iowa, Kansas, Michigan, Minnesota, Nebraska, New York, North Dakota, 
Ohio, Wisconsin; Manitoba. 
Tyre LOCALITY: Europe, on Rumex sp. 
DisTRrBputTION: Connecticut and Delaware, westward to Manitoba, eastern Colorado and 
Oklahoma; also in Europe, Japan, Africa and South America. i. 
InLustrations: Bot. Gaz. 34: 16, f. 4s, t, u; Krypt.-fl. Brand. Pilze 3: f. B97; Rostr. Plantep. 
Haandb. f. 91. 
ees Barth. Fungi Columb. 2466, 2967, 3072, 3262, 3564; Barth. N. Am. Ured. 58, 358, 
462, 760, 858, 859; Brenckle, Fungi Dak. 187; Carleton, Ured. Am. 36, Ellis & Ev. Fungi Columb. 
1577, 1657, 1658; Seym. & Earle, Econ. Fungi 70. 
