Arthur: Cultures of Uredineae in 1910 19 



dalis aurea, with infection only on the first, giving numerous 

 pycnia May 16, and aecia May 21. Another sowing was made 

 May 25, on Chenop odium album, Monolepis Nuttalliana, Cory- 

 dalis sempervirens, and Tissa canadensis, and again infection was 

 only obtained on the first, giving pycnia June 5, and aecia June 

 16. These attempts add nothing materially to previous 

 knowledge.^^ 



16. PucciNiA Jamesiana (Peck) Arth., on Atheropogon curti- 

 pendulus (Michx.) Fourn., collected by Mr. W. H. Long, at 

 Amarillo, Texas, was sown April 19, on Asclepias syriaca, giving 

 pycnia May 3, and aecia May 9. Previous cultures were also 

 made with Texan material sent by Mr. Long.^^ 



17. PucciNiA S'eymouriana Arth., on Spartina Michauxiana 

 A. S. Hitch, collected by Mr. W. H. Long, at El Reno, Okla., was 

 sown June 3, on Cephalanthus occidentalis, giving numerous 

 pycnia June 11, and aecia June 24.^^ 



18. PucciNiA Stipae Arth., on Stipa spartea Trin., collected 

 by Dr. E. W. Olive, at Brookings, S. D., was sown May 10, on 

 Aster ericoides and A. Novae-Angliae, giving pycnia in both cases 

 May 19, without developing aecia on A. ericoides, but giving aecia 

 on A. Novae-Angliae May 26. 



Another collection made by the writer on the same host, at 

 Spirit Lake, Iowa, was sown April 28, on Aster multiflorus, 

 giving pycnia May 6, and aecia May 17. A second sowing was 

 made May 6, on Aster Novae-Angliae, with pycnia May 16, and 

 aecia May 23; on A. multiflorus, with pycnia May 17, and aecia 

 May 23 ; on Solidago canadensis, with pycnia May 24, and aecia 

 June 6; and on Grindelia squarrosa, without infection. 



Another collection made by Mr. E. Bethel, at Golden, Colo., on 

 Stipa sp., was sown April 22, on Aster Novae-Angliae, with 

 pycnia May 2, and aecia May 16, on Grindelia squarrosa, with 

 pycnia May 2, and aecia May 16, and on the following hosts 

 without infection: Aster ericoides, A. multiflorus, Solidago cana- 



2" For previous cultures see Bot. Gaz. 35 : 19. 1903 ; Jour. Myc. 11 : 54. 1905 ; 

 12: 16. 1906; 13: 197. 1907; 14: 15. 1908; Mycol. i: 234. 1909; and 2: 225.. 

 1910, 



For previous cultures see Bot. Gaz. 35: 18. 1903. 



For previous cultures see Jour. Myc. 12: 24. 1906; and Mycol. i: 236;. 



1009. 



