BUST OF PEUOEDANUM FCENICULACEUM. 29 



At Lincoln, Nebr., on March 24, 1898, teleutospores of this same Pnc- 

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



It should be noted that it is possible for a perennial rust to exist in 

 an annual host, the mycelium 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 be another example in Puc- 

 cinia glumarum Eriks. and Henn. on wheat. 



