RUSTS. 119 



according to M. Tulasne and his disciples. Wlien 

 fresli^ it is reputed to exhale a faint odour^ as of the 

 primrose. During the winter and spring months 

 the wedge-like spores of the second crop are 

 matured on the fallen leaves (plate IX. figs. 189^ 

 190)^ and these are capable of a speedy germina- 

 tion^ and the production of secondary reproductive 

 bodies^ as in the willow rust above alluded to. 



Probably^ also^ the similar rust on the poplar 

 (plate IX. figs. 195^ 196)^ or on the aspen^ may be 

 met with under like conditions ; i.e., the summer 

 spores^ which are yellow and spherical^ on the living 

 leaves^ and the brown permanent masses of winter 

 spores on the fallen and decaying leaves. The sole 

 remaining British species is not uncommon on 

 leaves of the common spurge in gardens^ and 

 whilst the yellow pulverulent spores occur on the 

 upper^ it will not be improbable that black per- 

 manent spots will be found on the lower leaves 

 (plate IX. figs. 193^ 194)^ inclosing closely-packed^ 

 rudimentary^ elongated or wedge-shaped cellules of 

 the winter spores. 



Any one may make himself acquainted with the 

 genus Coleosporium with but little trouble_, which 

 the acquisition will more than compensate. A 

 summer stroll into any locality in which the com- 

 mon coltsfoot can be found_, will be certain to prove 

 suSicient. Let the spot selected be any station on 

 the North Kent Eailway^ for those who reside in 

 town^ or even a trip to the Crystal Palace and a 



