RUST OF PEUCEDANUM FCENICULACEUM. 29 



At Lincoln, Nehr.. on March 24, 1898, toleutosporcs of this same Puc- 

 cinia germinated in a water-drop culture in twenty-four hours. 



It .should l)e noted tliat it is possible for a perennial rust to exist in 

 an annual host, the nivceliuni of the rust being carried over winter in 

 the seed of the host. Such an instance is practically certain in the 

 Euphorbia rust already discussed. Granting that Doctor Eriksson's 

 experiments were accurate, there would l)e another example in Ihic- 

 clnla (jliunaruvi Eriks. and Henn. on wheat. 



