188 Illinois State Laboratory of Natural History. 



P. maculosa, Schw. 



III. Amphigenous. Sori scattered or regularly collected 

 in definite circinate clusters, often appearing on both sides of 

 the leaf over the same area, cinnamon-brown; spores clavate- 

 oblong, thin walled, fragile, smooth, much constricted, upper 

 segment widest, apex thickened, rounded or variously pointed, 

 base narrowed to the pedicel, 15-18 by 30-45 /*; pedicel hya- 

 line, usually less in length than the spore. 



On Cynthia Virginica: Johnson, May 16, 4709. 



Schweinitz (Syn. Fungi Am. Bor., p. 295, No. 2922,) refers 

 this species to P. maculosa, Strauss; but the latter is P. pre- 

 nanthis (Schum.), and is very different from the present species. 



P. lobeliae, Gerard. 



III. Mostly hypophyllous. Sori small, scattered or irreg- 

 ularly and rather loosely clustered, cinnamon-brown; spores 

 oblong, smooth, thin walled, very deeply constricted, fragile, 

 segments equal, or the lower narrower, 15-18 by 30-39 /u; ped- 

 icel very fragile, shorter than the spore. 



Sori minute, scattered or confluent, tawny brown ; spores oblong- 

 elliptical, slightly constricted at the septum and easily separating into 

 two parts, pale, .0013-.0016 in. long ; pedicel short or obsolete. Peck, 

 XXVI. Rep. N. Y. Mus., p. 77. 



On Lobelia syphilitica: Adams, July 7, 5444; McLean, 

 Aug. 6, 2303, Sept. 6, 5669; LaSalle, Sept. 13, 1517, Sept. 17, 

 1566; JoDaviess, Sept. 20,6026. L.puberula: Johnson, May 

 13, 4710; Union, Aug. 18. 



This is P. microsperma, B. & C. in Grevillea III., p. 55. 

 The sori are usually more densely aggregated on L. puberula, 

 but there is no other difference. 



P. seymeriae, Burrill. 



III. Hypophyllous, and on stems and calyces. Spots 

 definite, dark-colored; sori rather large, mostly crowded in con- 

 spicuous circular clusters a fifth of an inch in diameter, these 

 sometimes confluent, dark brown; spores elliptical or oval, lit- 

 tle constricted, obtusely rounded at the ends, smooth, wall firm, 

 brown, 15-21 by 30-36 /*; pedicel hyaline, broad, persistent, 

 twice as long as the spore. 



