JONES' SOFT ROT OF CARROT, ETC.: CULTURAL CHARACTERS 247 



Fig. 187. — Flaoella of Bacillus aroideae Townsend. Photographed by the 

 writer March 29, 1915, from three fields on a shde stained by M. Katherine Bryan 

 from a 24-hour agar culture using van Ermengem's silver nitrate method. Not 

 Townsend's original isolation but one of our own from a diseased calla lily, proved 

 up on calla lily. X 1000. 



