Jackson : New Rusts on Carduaceae 



105 



A specimen of the original collection, received some time ago by 

 Dr. Arthur from Spegazzini, has been carefully studied and it is 

 evident that the species is identical with Puccinia praealta Jack- 

 son & Holway (cf. Jackson, Bot. Gaz. 55: 306. 1918). The 

 latter was described from several collections on Vernonia trifloscu- 

 losa H.B.K. made by E. W. D. Holway in Guatemala and Costa 

 Rica. A comparison of the host of P. Tonduziana with P. prae- 

 alta leaves little doubt that they are the same. 



Spegazzini, presumably on account of the character of the sorus, 

 mistook the colorless uredospores for aeciospores, and described 

 aecia and telia only for the species. His specimens are consider- 

 ably older than most of the Holway collections and show some sori 

 on the under surface of the leaves, while many of the epiphyllous 

 sori are empty and their deep-seated origin is not as evident. 



Puccinia subdecora Sydow & Holway; Sydow, Ann. Myc. 1 : 17. 



1903 



With this Puccinia, which occurs in the west on Coleosanthus 

 grandiflorus (Hook.) Kuntze, an Aecidium is sometimes associ- 

 ated, and for a time it was thought that it was a long-cycled aut- 

 eu-Puccinia. When the final study of this species was made, how- 

 ever, the writer became convinced that the aecia belonged to a 

 heteroecious rust, on account of the fact that no uredinia developed 

 in certain collections on which the aecia were well past maturity, 

 and because of differences in distribution. Ten aecial collections 

 are in the Arthur herbarium from Colorado, Arizona, and New 

 Mexico, while only five uredinial or telial collections have been 

 made in Colorado and Utah. 



A careful search was therefore made for evidence as to the type 

 of life history of this species. A. O. Garrett made a uredinial 

 collection of this species June 22, 1905, at Mill Creek Canyon, Salt 

 Lake County, Utah. The sori in this collection are confined to the 

 stems of young shoots and occur just below the surface of the 

 ground. A careful study of this collection has revealed the pres- 

 ence of a few pycnia associated with these uredinia, indicating that 

 this species is a brachy-form referable to the genus Bullaria of the 

 Arthurian classification. With reference to this collection Mr. 



