Arthur: Cultures of Uredineae 24 t) s ^ 



N. J., and sown May 6 on Myrica ccrijcra, giving rise to pycnia 

 May 15, and aecia June 6. This most interesting result was in 

 accord with field observations made by Dr. Fromme, who has 

 recorded the steps which led to the inference of relationship, and 

 has also discussed the results, in a paper 42 anticipating this report. 

 The aecia of this species are of the aecidioid form, and not roes- 

 telioid, as in the majority of the species of the genus. Moreover, 

 the host belongs to a family more divergent from the Malaceae, 

 which bears most of the Gymnosporangial aecia, than heretofore 

 supposed to be possible. The telial stage was once made the basis 

 of a separate genus, Hamaspora, on account of the slender, more 

 than two-celled teliospores. Completing a knowledge of the life 

 history of a species with so many outlying characters is an espe- 

 cially notable achievement. 



Summary 



The following is a complete list of the successful cultures made 

 during the years 1912, 1913, and 1914. It is divided into two 

 series, species that have previously been grown in cultures and 

 reported by the writer or other investigators, and species whose 

 culture is now reported for the first time. 



A. Species Previously Reported 



1, (8) and 14. Puccinia Grossulariae (Schum.) Lagerh. 

 {P. albiperidia Arth., P. quadriporula Arth.) Teliospores from 

 Carex arctata Boott, C. crinita Lam., C. pubescens Muhl., and C. 

 tenuis Rudge, sown on Ribes Cynosbati L. 



2, 15 and 19. Puccinia extensicola Plowr. (P. Caricis- 

 Asteris Arth., P. Caricis-Solidaginis Arth., P. vulpinoidis D. & H., 

 P. Dulichii Syd.). Teliospores from Carex retrorsa Schw., sown 

 on Aster paniculatus Lam.; from Carex scoparia Schk., sown on 

 A. paniculatus Lam. and Euthamia grammifolia (L.) Nutt. ; 

 from Carex vidpinoidea Michx., sown on Solidago canadensis L., 

 S. glaberrima Martens, S. rugosa Mill, and S. mollis Barth. ; from 

 Dulichium arundinaceum (L.) Britt, sown on Solidago cana- 

 densis L. 



42 Fromme, D. A. A new Gymnosporangial connection. Mycol. 6: 226- 

 230. 1914. 



