250 



teleutospores, in that the teleutospores germinate at maturity in 

 the Hving host, and the epispore of the teleutospores is smooth. 

 Dr. J. C. Arthur, to whom specimens were sent, seems to think 

 that it may be the same as an unpublished species occurring in 

 Maine, and named by Mr. P. L. Ricker. 



The rust is so little known that it has been considered worth 

 while to describe it, even though it may be the same as the one 

 named by Ricker, in order that those who are interested in this 

 group of fungi may be on the look-out for it during the spring 

 and summer of 1907. The following description has been pre- 

 pared from freshly collected material. The color of the sori is 

 much darker on dried specimens of SisyrincJunni. 



Uredosori. — Spots yellow or none. Sori single or in rows, 

 amphigenous, pulverulent, orange-yellow, surrounded by the 

 ruptured epidermis, elliptical to linear ; uredospores orange-yel- 

 low, broadly ovate to subspherical, echinulate, 11.5-13/iX 

 8-iO/i. 



Teleutosori. — Single or in rows, amphigenous, pulvinate, 

 orange, becoming brown, somewhat gelatinous ; teleutospores 

 accompanying or following the uredospores, which they resemble 

 in color, elliptical to oblong, apex tapered and thickened, base 

 narrowed, 16-19/i x 8-9 /i, epispore and pedicel subhyaline ; 

 pedicel much longer that the spore, up to 50 /i; teleutospores 

 germinating in the living ho.st. 



Occurring on Sisynncliiuui graininoides Bick. at Morgantown, 



West Virginia. 



West Virginia Agricultural Experiment Station, 

 Morgantown, W. Va., 

 November I, 1906. 



REVIEWS. 



Postelsla, The Year Book of the Minnesota Seaside Station.* 



This is in reality volume 2 of a series of papers under the name 

 Postclsia, the first volume of which appeared in 1902. But, un- 

 fortunately, the convenient form of citation " Postelsia 2:" or 

 " Postelsia, vol. 2 " can not be used with technical accuracy in 

 referring to the present work, as no volume number is to be 



*8vo. Pp. 1-347 -|- Index. //. /-jj. St. Paul, Minnesota, 1906. Price ^2.25. 



