56 



GRASSES OF IOWA. 



Fig. -K). Crab grass (Panicumsanguinale), to the left ; common in cultivated fields. To 

 the ri^'ht, Panteum glubrum, common in Hood plains of rivers, and becoming common in 

 lawn-, a, let f with sheath; 6. spikelet ; c, d, scales, stamens and pistil. iChafrlotte M. King.) 



