318 NORTH AMERICAN FLORA [Volume 7 
62. Dicaeoma Cephalanthi (Seym.) H. S. Jackson, Proc. Ind. Acad. 
Sci. 1915: 444. 1916. 
Aecidium Cephalanthi Seym.; Burrill, Bot. Gaz. 9: 191. 1884. 
Puccinia Seymouriana Arth. Bot. Gaz. 34:11. 1902. 
Aecidium obesum Arth. Bull. Torrey Club 37: 579. 1910. 
O. Pycnia amphigenous, in small crowded, opposed groups 0.3-I mm. across, incon- 
spicuous, honey-yellow becoming brownish, flattened-globoid, smail, 96-128 « broad by 58~77 u 
high; ostiolar filaments 30-48 » long. 
I. Aecia hypophyllous, in circular groups 2-7 mm. across, irregularly crowded on scarcely 
thickened but much discolored spots, cupulate, 0.3-0.5 mm. in diameter; peridium colorless, 
evanescent; peridial cells oblong to cylindric, often slightly curved, 16-23 by 32-64 p, over- 
lapping, the outer wall thick, 5-9 u, smooth, transversely striate, the inner wall moderately 
thick, 3-6 4, coarsely verrucose; aeciospores globoid or broadly ellipsoid, large, 29-35 by 32- 
42 4; wall colorless, greatly thickened, 5-12 u, irregular within, forming an angular or stellate 
cavity, closely and prominently verrucose. 
On APOCYNACEAE: 
Amsonia Amsonia (L.) Britton (A. Tabernaemontana Walt., A. salicifolia Pursh), Missouri. 
A pocynum cannabinum I,., Indiana, New Jersey, Oklahoma. 
A pocynum sibiricum Jacq. (A. hypericifolium Ait., A. cannabinum hypericifolium A. Gray), 
Illinois, Kansas, Nebraska. 
On ASCLEPIADACEAE: 
Asclepias pulchra Ehrh., New York. 
Asclepias syriaca L,. (A. Cornuti Decaisne), Missouri. 
Asclepias sp., North Dakota. 
On RUBIACEAE: 
Cephalanthus occidentalis I,., Florida, Illinois, Indiana, Kansas, Missouri, Nebraska, New 
. Jersey, New York; Quebec. 
II. Uredinia epiphyllous, on the rough surface, intercostal, arising from the soft tissues, 
scattered, narrowly oblong or oblong-linear, 0.5-1 mm. long, early naked, orange-yellow be- 
coming brownish, pulverulent, ruptured epidermis inconspicuous; urediniospores obovoid or 
broadly ellipsoid, large, 19-35 by 29-45 yw; wall colorless, 2-3 yw thick at the sides, greatly thick- 
ened above, 9-18 uw, sparsely and very prominently verrucose-echinulate, the pores obscure. 
III. Telia epiphyllous, numerous, crowded and sometimes confluent, oblong, 0.5 mm. 
broad by 1-5 mm. long, early naked, pulvinate, compact, chocolate-brown, ruptured epidermis 
soon disappearing; teliospores oblong or cylindric, 16-23 by 37-58 u, rounded, obtuse or acute 
above, narrowed at base, only slightly constricted at septum; wall smooth, chestnut- or 
dark chestnut-brown, about 1.5 » thick, moderately thickened at apex, 5-9 uw; pedicel color- 
less, once to twice length of spore. 
On PoackaE: 
Spartina cynosuroides (I,.) Roth (S. polystachya Ell.), New York. 
Spartina Michauxiana Hitche. (S. cynosuroides A. Gray, not Roth), Illinois, Indiana, Iowa, 
Kansas, Massachusetts, Montana, Nebraska, North Dakota, Oklahoma, Wisconsin; 
Ontario, Quebec. 
Spartina Spartinae (Trin.) Merr. (S. junciformis Engelm. & Gray), Texas. 
TyPE LocaLity: Ravenswood, near Chicago, Illinois, on Cephalanthus occidentalis. 
DISTRIBUTION: Prairies from Montana to Wisconsin, and southward to Texas, from central St. 
Lawrence-river region southward tocentral New York, and on the Atlantic coast from Massachu- 
setts to Florida, : 
ILLUSTRATIONS: Bot. Gaz. 34: 13, f. 3k, l; Bull. Lab. Nat. Hist. Univ. Iowa 5: ol. 4, 5, f. 53a, b. 
Exsiceati: Arth. & Holway, Ured. Exs. Ic. 53a, b; Barth. Fungi Columb 3265, 3369, 3967, 4103; 
Barth. N. Am. Ured. 261, 766, 966, 1171, 1301; Brenckle, Fungi Dak. 445; Carleton, Ured. Am. 20; 
Ellis, N. Am. Fungi 1474; Ellis & Ev. Fungi Columb. 1295; Ellis & Ev. N. Am. Fungi 1817, 2225 
in part; Rab.-Wint. Fungi Eur. 3518; Rab.-Wint.-Paz. Fungi Eur. 4026; Roum. Fungi Gall. 
3864; Seym. & Earle, Econ. Fungi 69; Sydow, Ured. 496; Vesterg. Micr. Rar. Sel. 1101, 1102. 
63. Dicaeoma Chloridis (Speg.) Kuntze, Rev. Gen. 3°: 468. 1898. 
Puccinia Chloridis Speg. Rev. Arg. Hist. Nat. 1: 115. 1891. . 
Puccinia Chloridis Dietel, Hedwigia 31: 290. 1892. 
Puccinia Dietelii Sacc. & Sydow; Sacc. Syll. Fung. 14: 358. 1899. 
O and I. Pyecnia and aecia unknown. 
II. Uredinia amphigenous, scattered, narrowly oblong, small, 0.3-0.7 mm. long, rather 
tardily naked, pale-yellow or brownish, ruptured epidermis not conspicuous; urediniospores 
