[HARRISON et lîARLow] NODULE ORGANISM OF THP] LEGUMINOSAE 2 1 9 



31. Ps. radicicola, showing flagella from Vicia villosa. From a culture on ash- 

 maltose-agar grown at 25°C for 1(3 days. Stained with saturated al- 

 coholic gentian violet. 



i V 



t' 





'\ 



>. 





32. Ps. radicicola, from Lathyrus sativus. from ash-maltose-water, 17 days at 

 25'"C. Amyl Gi'<un Stain. Unbranched cells. 



Sec. IV., 1906. 16 



