90 NEW YORK STATE MUSEUM 



September 10, 192 1 ; Lewis Point, Madison county, September 

 12, 1921. 



On Asclepias incarnata L. Lewis Point, Madison 

 county, H. D. House, September 12, 1921. 



During several seasons that the writer has been interested 

 in rusts, search had been carefully made for this species, but 

 until 1921 unsuccessfully. During the season of 1921, however, 

 this rust was universally present on almost every clump of 

 milkweed throughout central New York. In many cases the 

 infection was so complete that the rust could be detected from a 

 considerable distance. 



Nigredo Junci-effusi (Sydovv) Arthur 

 Napanoch, Ulster county, on Juncus c f f u s u s L. H. D. 

 House, August 19-21, 192 1. 



Nigredo piriformis (Cke. & Peck) Arthur 

 On Acorns Calamus L., Woodville, Jefferson county, 

 H. D. House, September 10, 1921. Lewis Point, Madison county, 

 September 12, 1921. Pecksport, Madison county, September 

 16, 1921. 



Like Nigredo Howei, this rust occurred during the sea- 

 son of 1 92 1 in unusual abundance. 



Nyssopsora clavellosa (Berk.) Arthur 

 Newcomb, Essex county, on leaves of A r a 1 i a nudicaulis 

 L. H. D. House, August 10, 192.1, and on the same host at Long 

 Lake, Hamilton county, August II, 1921. 



Micropuccinia ornata (Arth. & Holw.) Arth. & Jackson 

 Woodville, Jefferson county, on R u m e x Britannica L. 

 H. D. House, September 10, 1921. 



Micropuccinia recedens (Sydow) Arth. & Jackson 

 On Senecio aureus L., Arkville, Delaware county. Percy 

 Wilson 117- July 25, 1915; Williamsbridge New York City, no. 303, 

 June 2, 1916. 



Mollisia Iridis (Rehm) Sacc. 



South Bay, Madison county, on languishing leaves of Iris 

 versicolor L. H. D. House, September 16. Determined by 

 Dr F. J. Seaver, who states that "the apothecia are more superficial 

 than those of European specimens." 



