44 LABORATORY MANUAL IN FIELD CROPS 



PRACTICUM NO. 34 



Object. A Study of the Vegetative Portions of the Common 

 Grasses. 



Materials. The grasses in the field or on the agrostology 

 plots. 



Method. Make observations and tabulate the descriptions 

 in the notebook, according to the following plan : 



1. Scientific name. 



2. Common name. 



3. Where found. 



4. Leaf sheath : round, partly split, entire. Leaf sheath : 

 length, from inches to inches. 



5. Ligule: long, medium, short, acute pointed, obtuse 

 pointed, truncate, rectangular, serrated edges, not serrated. 



6. Leaf blade : erect, ascending drooping, smooth, downy, 

 rough, rolled or convolute in the bud, folded or conduplicate 

 in the bud. 



7. Color leaf blade Length inches to 



inches. 



8. Leaf blade : length inches to inches. 



9. Midrib : prominent, medium, small. 



10. End of blade : acuminate ; tapering, obtuse, parallel- 

 sided. 



11. Lower internode: normal, thickened. 



12. Habit of growth : number of stolons, short stolons, long 

 stolons. 



13. What characters serve to identify this grass ? 



REFERENCE 

 Livingston's Field Crop Production, pp. 5-11. 



