Arthur: Cultures of Uredineae 'o42*^ 



A sowing of telia was made April I on Clematis Drummondii, 

 C. Douglasii, C. virginiana, Aqnilegia flavescens, A. canadensis, 

 Thalictrum Fendleri, and T, dioicum. Abundant infection oc- 

 curred on the first named host, but on no others, pycnia appear- 

 ing April 5, and aecia April 18. 



The results are in accord with the cultures of 1912, reported 

 above under number 6, but indicate another race not met with 

 before. 



22. Uromyces perigynius Halst. A collection of this species 

 on Car ex tribuloides made at French Lick, Ind., by Mr. Ludwig 

 and the writer, was sown April 1 on Aster paniculatus, A. Drum- 

 mondii, A. Tweedy i, Solid ago canadensis, S. rugosa, and Euthamia 

 grannnifolia. Infection was secured only on Aster Tweedyi, and 

 then so sparingly that it was overlooked until April 8, when the 

 aecia were observed. Cultures for 1912 are reported above 

 under number 8. 



This species of rust from other Carex hosts has previously been 

 been grown 37 on two other species of Aster } and five species of 

 Solidago. 



23. Uromyces Scirpi (Cast.) Burr. Material on Scirpus fluv- 

 iatilis, sent by Mr. E. T. Bartholomew from Madison, Wis., was 

 sown April 22 on Sium cicutaefolium, giving rise to a few pycnia 

 May 5, but without further development. Another similar sow- 

 ing April 24 gave rise to an abundance of pycnia May 5, and 

 aecia May II. 



The former cultures 38 with American material have been on 

 Cicuta maculata. 



24. Gymnosporangium nidus- avis Thax. Telial material on 

 Juniperus virginiana, gathered by Dr. Fromme at Woods Hole, 

 Mass., was sown May 11 on Amelanchier vulgaris, giving rise to 

 pycnia May 19, and a great abundance of aecia June 20. 39 



25. Gymnosporangium Botryapites (Schw.) Kern. Telial 

 material on Chamaecyparis thyoides sent by Dr. Fromme from 

 Lakehurst, N. J., was sown May 6 on the leaves of Amelanchier 

 canadensis and Aroma arbiitifolia, with no infection on Aronia, 



37 Jour. Myc. 10 : 15. 1904; and Mycol. 4: 32. 1912. 



38 Jour. Myc. 13: 199. 1907; 14: 17. 1908; and Mycol. 1: 237. 1909. 

 :!!> For previous cultures see Jour. Myc. 14: 19. 1908; Mycol. 2: 230. 



1910; 4: 25 and 56. 1912. 



