Bui. 108, Bureau of Chemistry, U. S. Dept. of Agriculture. 



PLATE V. 



FIG. 1. PLANTAGO MAJOR L. 



FiQ. 2. PLANTAGO RUOELII DUCAISNE. 



FIG. 3. PLANTAGO LANCEOLATA L. 



FIQ. 4. PLANTAGO ARISTATA MICHX. 



TRANSVERSE SECTIONS OF SEEDS OF SPECIES OF GENUS PLANTAGO. (X 60.) 



