144 FUNGI. 
end of its vegetation. The two forms of spores in this genus 
are constantly found on the same leaf, and in the same pulvinule, 
but generally the pulverulent spores abound at the commence- 
ment of the summer. The reniform sporules begin to germinate 
in a great number as soon as they are free; some few extend a 
Fic. 82.-Germinating pseudospores of Fia. 83.—Germinating pseudospore (0) of 
(6) Coleosporium Sonchi; ‘s 8) secondary Melampsora betutina (Tulasne}. 
spores, or sporules (Tulasne). : 
filament which remains simple and uniform, but more commonly 
it forms at its extremity a second sporule. If this does not 
become isolated, to play an independent life, the filament is 
continued, and new vesicles are repeated many times. 
In Melampsora the summer spores are of the Lecythea type, 
and were included in that genus till their relation with AfLelamp- 
sora was clearly made out. The winter spores are in solid 
pulvinules, and their fructification takes place towards the end 
of winter or in the spring. This phenomenon consists in the 
