PAPERS GIVING RUSTS OF NORTH AMERICA. 225 



2881. 71. C. A. Berberidatum, Lk. 157, on Berberis canadensis, Carolina. 



This number is not starred, and it is probable that a reference 

 to the record in the North Carolina list was omitted unintentionally. 

 It is here added. 



(437. 8. [/Ecidium] Berberidis. Rather rare on leaves of Berberis 

 vulgaris, covering the mountains of Wilkes County.) 



Represented by a mounted specimen of a stout, ash-gray stem, 

 3.5 cm. long, having two fascicles of leaves, two full-grown leaves 

 in one fascicle and three in the other, each leaf i-5 by 3 cm. or some- 

 what less, bearing a number of small groups of young secia, one 

 group only appearing mature (see cut). There is also an empty 



Fig. I. From a photograph of the mounted specimen in the Academy of 

 Natural Sciences of Philadelphia, basis of Schweinitz's No. 2881. Each 

 specimen in the mounted set is treated essentially in the same manner. The 

 writing was done by Michener. Engraved full size. 



packet labelled inside "/Ecidiinn Berberidis," and on the outside 

 " Ecidium Berberidat in Berb canad Salem." 



The rust is the secial stage of Piiccinia poculiformis (Jacq.) 



