228 DAVIE AND WILSON—USTILAGO VAILLANTII. 
the spores readily germinate in water (text-fig. 1), and produce 
a three-celled promycelium.* After drying for about a fortnight, 
they no longer germinated in water, but in plum decoction 
Fic. 1.—Ustilago Vaillantii, Tul. 
Germinating spore. 
Formation of promycelium. 
First division in promycel 
omycelium de! tached meas spore ; — division. 
wo divisions. 
\ KEK red ft re be 
J r 
eee oF 
quickly gave rise to the promycelium. In both cases sporidia 
were shortly afterwards forme 
present no information is available regarding the method 
of infection ; whether spores from the anthers of Scilla bifolia 
can bring about infection of Chionodoxa is not known 
* Cf. O. Brefeld, Unters. aus dem Gesammtgeb. der Mykuiogie, Heft xii (1895) 
p. 111, Taf. vi, figs. 32-38. 
