32 Barclay —On the Life-history of 
and with regard to the latter statement we have an experi- 
mentally proved case to the contrary in Puccinia Polliniae 
(Heteropuccinia), the life-history of which I have described else- 
where 1 , and where it was shown that the teleutospores germi- 
nated both at once. and after a period of winter rest, in each 
case producing a mycelium bearing aecidiospores. I advanced 
the view then that in the case of P. Polliniae the immediate 
germination of the teleutospores helped to distribute the 
fungus, vicariously taking up the function of uredo- and 
aecidio-spores, the former of which are not abundant in this 
species. I also developed this view in a paper recently 
submitted to the Linnean Society on the life-history of the 
remarkable Uromyces Cunninghamianus. In the present case, 
and in all similar cases, where no separate spores are produced 
for distributive purposes (uredo- and aecidio-spores) the teleu- 
tospores must perform both distributive and preservative 
functions (unless there is a perennial mycelium, which there is 
not in the case under consideration) ; and in order to accom- 
plish the former the spores must be capable of germination 
immediately, and to accomplish the latter must also be able to 
rest. In similar cases, where only teleutospores are produced, 
if there be a perennial mycelium to ensure the persistence of the 
species, it is conceivable that the teleutospores would subserve 
only a distributive function, being all immediately capable of 
germination. Puccinia Adoxae , Schum. would however be in 
evidence against this view, if it really has a perennial mycelium, 
and if the spores are really only capable of germination after 
a winter rest. It is quite possible however that an immediate 
power of germination after ripening has been overlooked in 
this species. But curiously enough it is exceptional to read of 
a so-called Leptopuccinia having a perennial mycelium, and if 
all those so classified are really complete fungi, which I think is 
extremely doubtful, their teleutospores will probably be found 
on careful examination to germinate both immediately after 
ripening and after a winter rest. 
1 On the Life-history of a new Aecidium on Strobilanthes Dalhousianus , Clarke, 
Sc. Memoirs by Medical Officers of the Army of India, Part II, 1887. 
