PLATE 6 
Agar slant cultures of the clover organism. 
Potato agar (1.8 per cent agar) streaks of Bacterium trifoliorum incubated for four 
days at 26® C. 
A. —Wisconsin isolation 1920-III illustrates well the characteristics of this more 
spreading strain. As in the plate colonies (see B, PI. 5) the radial folds are not so 
closely packed, the edges of the colony less raised than in isolation 1916-II shown in B. 
B. —Wisconsin isolation 1916-II. (Compare also with colonies in PI. 5, A.) 
