106 



Mycologia 



Garrett wrote (in litt. Jan. 21, 1919) : " I pulled up some of the 

 plants of the Coleosanthus for another purpose and noticed the 

 sori on the stems next the roots and entirely invisible from the 

 surface of the ground." This observation, together with the find- 

 ing of pycnia on the collection referred to, suggests that the life 

 history of many more species of Puccinia could be determined if 

 collections could be made early in the season as the plants are 

 coming through the ground. 



The aecia mentioned above have since been described as Aecid- 

 ium arcularium Arth. (cf. Bull. Torrey Club 47: 478. 1920). 



Puccinia Kuhniae Schw. 



A careful study of the common rust on Kuhnia in comparison 

 with the species on closely related hosts has resulted in the con- 

 viction that Puccinia Brickelliae Pk. and P. Barroetiae Syd. should 

 be considered synonymous with P. Kuhniae. The hosts of the 

 three species are very closely related and there is no essential dif- 

 ference between the rusts. The determination of the life history 

 of this species as a brachy-Puccinia is based entirely on cultures 

 made by Dr. Arthur (cf . Jour. Myc. 12 : 23. 1906 and Mycologia 

 1: 233. 1909), no field collections of pycnia associated with 

 uredinia having been made. 



The type locality for. this species was recorded by Schweinitz 

 . as Bethlehem, Pennsylvania. Since this is a western rust, the 

 most eastern locality of any recent collection being in Indiana, 

 there is some doubt whether the type collection is from Pennsyl- 

 vania as stated. It is possible that Schweinitz made this collection 

 in Indiana, as it is known that at one time he traveled as far west 

 as Hope, Indiana. 



The synonymy, etc., of the species, according to this interpreta- 

 tion, is as follows : 



Puccinia Kuhniae Schw. Trans. Am. Phil. Soc. II 4: 296. 1832 



Puccinia Brickelliae Peck, Bull. Torrey Club 12: 34. 1885. 

 Dicaeoma Brickelliae Kuntze, Rev. Gen. 3 3 : 468. 1898. 

 Dicaeoma Kuhniae Kuntze, Rev. Gen. 3 3 : 469. 1898. 

 Puccinia Barroetiae Sydow, Monog. Ured. 1 : 28. 1902. 

 Bullaria Kuhniae Kern, Trans. Am. Microsp. Soc. 32 : 65. 191 3. 



