[HARRISON & BARLOW] NODULE ORGANISM OF THE LEGUMINOSAE 215 



28' Ps. rodieicohi. same preparation as 28, but stained to show the slime 

 threads Kiitscher's gentian violet. 



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29. Pa. radicicola from Trifolium praten.se. From sediment of an ash-maltose- 

 water culture. Age 16 days at 25°C. Much branched cell, such cells 

 are frequent in the sediment. 



