188 Illinois State Lahorntory of Natural Histori/. 



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 ft; 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. 



I 



P. lobelise, Gerard. 



ITT. 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 ^; ped- 

 icel very fragile, shorter than the spore. 



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

 elliptical, sligbtly 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. pubenila : Johnson, May 

 13, 4710; Union, Aug. 18. 



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

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

 but there is no other diffei-ence. 



P. seymerise, 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. 



