62 NORTH AMERICAN FLORA [V01.UME 7 



Type locality : Madison, Wisconsin, on Menispermum canadense. 

 Distribution : Illinois and Wisconsin to Kansas and North Dakota. 



ExsiCCATi: Ellis, N. Am. Fungi 1490; Underw. & Cook, Illustr. Fungi 5P; Ellis & Ev. 

 Fungi Columb. 1066; Rab.-Wint. Fungi Eur. J^02 / Seym. & Earle, Econ. Fungi ^617, C23, C24. 



9. EntylOma compositarum Farl. Bot. Gaz. 8 : 275. 1883. 



Sori in leaves, small, angular, about 1-2 mm. in length, usually abundant and more or 

 less confluent, forming spots whitish or yellowish on the under side and darker often pur- 

 plish on the upper ; spores chiefly hyaline, ovoid to spherical or occasionally polyhedral, 

 smooth, thin-walled, chiefly 9-14^ in length; usually with evident hypophyllous outgrowth 

 of conidia which are fusiform or slightly clavate, often curved, about 15-20 fj. X 2-3 {J-. 



On Ambrosiaceae : - 



Ambrosia artetnisiaefolia, Maine, Massachusetts, 



Ambrosia p silo stachy a ^ Kansas, Wisconsin. 



Ambrosia trifida^^ District of Columbia, Illinois, Missouri, Wisconsin. 



Ambrosia sp., Minnesota, Ohio. 

 On Carduaceae : 



Aster cor difolius^ Massachusetts. 



Asier Novt-Belgii^ Maine, Massachusetts. 



Aster paniculatus^ Wisconsin. 



Aster puniceits^ Massachusetts, New Hampshire, Wisconsin. 



Aster sp., Delaware ; New Brunswick. 



Bidens laevis {B. chrysanthem.oides'), Kansas. 



Erigeron elatus, Washington. 



Erigeron philadelphicus , North Dakota, Wisconsin. 



Erigeron salsuginosus , Washington. 



Eupatorium, ageraioides^ Illinois, Iowa. 



Gnaphalium sp., Alabama. 



Helenium autumnale, Wisconsin. 



Heterotheca suhaxillaris {H. Lam^arckii) , Kansas^ 



Raiibida pinnata {Lepachys pinnata), Illinois, Iowa, Michigan, Minnesota, Wisconsin. 



Riidbeckia laciniata, Missouri, Ohio, 



Senecio aureus^ Nebraska, Wisconsin. 



Senecio Balsamitae {S. aureus Balsam.iiae) , Kansas. 



Silphium integrifolium , Wisconsin. 

 On Cichoriaceae : 



Lactuca canadensis^ Minnesota. 

 Type locality : New England, on Aster puniceus. 

 Distribution : New Brunswick to Alabama and Washington. 

 Illustration : Bot. Gaz. 19 : pi. 18, f. 8. 



ExsiCCATi: Ellis & Ev. N. Am. Fungi 1492a, 2429a, 2429b; Seym. & Earle, Econ. Fungi 

 C16, €17, C18. 



10. Entyloma polysporum (Peck) Farl. Bot. Gaz. 8 : 275. 1883. 



Pro tom.yces poly sporusTe.Q)s.\ Thtim. Myc. Univ. 1813. 1881. 



Sori in leaves, forming subcircular to more irregular and often indefinite areas, gen- 

 erally dark-brown, 2-5 mm., usually limited in number and killing more or less of the sur- 

 rounding tissue; spores hyaline to yellowish or even light chestnut-brown, ovoid to spher- 

 ical or somewhat polyhedral, smooth, usually with remains of the gelatinous hypha forming 

 outer coat of the thick wall, 12-17 /^ or in some cases even 20 ^ in length ; evidence of 

 conidia usually lacking. 



On Ambrosiaceae : 



Ambrosia ariemisiaefolia , Connecticut, Illinois, Indiana, Iowa, Michigan, New York, 



Wisconsin. 

 Ambrosia bidentata, Illinois. 

 Ambrosia trifida, Illinois, Iowa, New York. 



On Carduaceae : 



Gaillardia pulchella, Kansas. 

 Helianthus annuus, Montana. 

 >Type locality : Albany, New York, on Ambrosia trifida. 

 Distribution : Connecticut to Montana and Kansas. 



ExsiCCATi: Ellis, N. Am. Fungi 1492b ; Seym. & Earle, Econ. Fungi 292a-b, C31; Elhs & 

 Ev. Fungi Columb. 541 ; Roum. Fungi Sel. 4868 ; Thiim. Myc. Univ. 1813. 



11. Entyloma Holwayi Sydow, Ust. 282. 1901. 



Sori in leaves, forming subcircular or angular spots showing through on both surfaces, 

 at first yellowish but finally reddish-brown, distinct or rarely subconfluent, 2-6 mm. in 

 diameter ; spores hyaline to evidently tinted reddish-brown, ovoid to chiefly subspherical, 



