Arthur: Cultures oi L'kkuinkak }<4 ~' J 



iixity. The tclia are on Agropyron, Elymus, and Bromus chiefly 

 and the aecia on Clematis, Thalictrum, Aquilegia, Anemone, and 



probably other Rannncnlaceous hosts, and possibly on some hosts 

 of other families. 



7. Puccinia monoica (Peck) Arth. In the report of cultures 

 for 191 1 23 record was made of sowings of teliospores from Trise- 

 tuni subspicatum made June 20 upon two plants of Arabis (grown 

 from Colorado seed), one plant of which indicated infection by a 

 pathological change into a glomerate mass of rosettes, somewhat 

 paler than normal. In this condition the plant passed the winter. 

 Early in spring it began to send up a half dozen or more shoots 

 instead of the usual single shoot of normal plants. Pycnia first 

 were seen March 23, 1912, scattered over the considerably drawn 

 shoots. Before there was time for the aecia to mature the plant 

 accidentally died. 



Freshly gathered plants of an . Irabis bearing aecia, obtained May 

 13 at Palmer Lake, Colo., were received from Mr. Bethel, and 

 aeciospores from them sown May 18 on leaves of Koeleria cristata 

 and Trisefum subspicatum. Infection occurred only on the Koel- 

 eria, uredinia first being noticed June 18, and telia June 24. 



There is no present need of adding to the general discussion 

 of this species given in the last report of cultures. 24 We have 

 now grown the rust from both aeciospores and teliospores, and 

 shown that it occurs on both Trisetum and Koeleria, with some 

 indication of biological races. 



8. Uromyces perigynius Halst. A collection on Carex in- 

 tumescens, made by Dr. Charles E. Fairman at Lyndonville, N. Y., 

 was sown April 24, on Aster paniculatus, Solidago canadensis, 

 Erigeron animus. Euthamia grtiminifolia, and Onagra biennis. 

 On May 7 pycnia began to show in great abundance on the Aster, 

 followed on May 10 by aecia. On the Solidago a few pycnia 

 appeared May 8, but no aecia developed, although the host plant 

 was in good condition. 



In former cultures 25 material on this host from Nova Scotia 

 produced infection on Aster, but not on Solidago. Material on 



23 Mycol. 4: 60. 1912. 



24 Mycol. 4: 59. 1912. 



25 See Jour. Myc. 10 : 15-17. 1904; Mycol. 4: ax, 22. 1912. 



