MCCULLOCH'S CAULIFLOWER SPOT: TYPE 



301 



FIG. 231. Cauliflower leaves attacked and spotted by, Bacterium maculi- 

 colum, McCulloch's cauliflower parasite. A pure-culture inoculation. Time, 

 13 days (May 19 to June 2, 1909). The infections are stomatal. 



