ia 



Journal of Mycology [Vol. 8 



III. Teleutosori hypophyllous, small, oblong, pulvinate, blackish 

 brown, ruptured epidermis evident; teleutospores clavate or oblong- 

 clavate, 14-20 by 35-42 ^ ; septum above the middle; apex obtuse or 

 truncate, much thickened; side walls thin; pedicel firm; colored, one 

 fourth or one half the length of the spore. 



On Erigeron annuus (L.) Pers. and Carex festucacea Willd., Lafay- 

 ette, Ind. 



This species is without doubt the Caeoma (Aecidium) erig- 

 eronatum Schw. (Trans. Amer. Phil. Soc. 4:292), and probably 

 occurs on many species of Erigeron throughout North America. 

 Cultures were made as follows : 



April 25, teleutospores from Carex festucacea sown on Erigeron 

 annuus; May 2, spermogonia ; May 11, aecidia. 



April 25, teleutospores from C. festucacea sown on Taraxacum 

 taraxacum ; no infection. 



PUCCINIA CARICIS-ASTERIS Sp. nOV. 



0. Spermogonia epiphyllous, yellow, punctiform, sunken in tissue 

 of the leaf. 



1. Aecidia hypophyllous. collected in groups on -slightly swollen 

 yellow or purplish spots, low, margin much divided and recurved; 

 aecidiospores subglobose, 12-17 ll in diameter, wall thin, minutely 

 roughened. 



II. Uredosori hypophyllous, oblong ; uredospores oblong or obovate, 

 12-16 by 18-22 jx ; wall thin, echinulate ; pores few, scattered. 



III. Teleutosori hypophyllous, oblong to oblong-linear, prominent, 

 soon naked, dark brown, ruptured epidermis noticeable ; teleutospores 

 oblong or clavate-oblon^. 16-22 by 48-56 pul apex rounded, greatly thick- 

 ened; pedicel slender, colored, half the length of the spore. 



On Aster paniculatus Lam., Aster cordifolius L. and Carex foenea 

 Willd. The latter collected at Decorah, Iowa, Dec. 30, 1900 by E. W. D. 

 Holway, and at Lafayette, Ind., April 30, 1901, by the writer. 



The common aecidium, found on many species of Aster, is 

 probably included in this species, but not the aecidia found on 

 Erigeron, Solidago or Geranium. It is the same as Aecidium 

 asterum Schw. The uredospores and teleutospores are very sim- 

 ilar to those of the preceding species, and are suggestive of 

 biological species. Much work, however, must be done before 

 an approximately accurate statement can be made regarding the 

 Carex species having aecidia upon Compositae. Data for the 

 present separation was obtained as follows : 



April 25, teleutospores from Carex foenea (Iowa) sown on Erigeron 

 annuus ; no infection. 



April 29, teleutospores from C. foenea (Iowa) sown on Erigeron 

 annuus ; no infection. 



May 4, teleutospores from C. foenea (Indiana) sown on Aster 

 paniculatus ; May 13, spermogonia ; May 22, aecidia. 



May 4, teleutospores from C. foenea (Indiana) sown on Erigeron 

 annuus ; no infection. 



May 11, teleutospores from C. foenea (Indiana) sown on Geranium 

 maculatum ; no infection. 



