PRACTICUMS FOR WHEAT £^3 



♦ * Fruit oblong, narrow. laterally compressed, somewhat acuminate 

 I / / / / j-^_ j^^^ duTntm. 



3. TV. Polonicum L. A very striking species, with large, compressed, 

 mostly blue-green spikes. Spikelets appearing as if cut o3 trans- 

 versely, because the third and fourth flowers scarcely reach to the 

 point of the two lower ones ; flowering glumes compressed, navicu- 

 lar, many-ner\'ed, a\N-ned; fruit 8-12 mm. long. 



METHOD OF DESCRIBING WHEAT VARIETIES. 



19S. Half Grown Plant in the Field. Each student should be given a 

 printed or t}-peAATitten sheet as indicated below and requested to describe two or 

 more varieties of wheat growing in the field by underscoring the adjective which 

 most nearly applies to the condition foxmd. 



1. Color: light green; medium green; dark green; light yellowish green; 

 iQedium yellowish green; dark yellowish green; light gray green; medium gray 

 green ; dark gray green. 



2. Leaf blade : average length of ten blades . 



3. Leaf blade: average width of maximum dimensions of ten blades 



4. Leaf blade : erect ; ascending ; drooping. 



5. Leaf blade: smooth; rough; dov\-ny. 



6. Leaf blade : veins prominent ; vein' not prominent 



7. Leaf blade : end tapering ; end wit -' ^.2S oaralleL 



8. Leaf sheath: green; green s'-?.dii.g t p -)l3. 



9. Ligule: 2.5 mm. long; 2 mm^ long m^-»^ long. 



10. Ligule : white ; purple. 



11. Auricles: white; green; whit« \\'i h p rple tips ; purple. 



12. Auricles : hairy ; partly hairy ; smooth. 



Note : The above practicum and those following are intended to teach a method 

 of describing wheat varieties as first proposed by Cobb and published by Scofield 

 The student should be referred to The Description of "Wheat Varieties, by Carl S 

 Scofield- U. S. Dept. of Agr., Bu. of PL Ind. BuL 47 



199. Mature Plant in the Field. Each student should be given d 

 printed or t}-pewritten sheet as indicated below and requested to describe two 01 

 more varieties of wheat growing in the field by underscoring the adjective whicl 

 most nearly applies to the condition found. 



1. Height : average of ten culms to tip of apical gloom, not counting awi 



if any . 



2. Vigor of plant: strong; medium; weak. 



3. Diameter below spike : average of ten culms . 



4. Depth of furrows below spike : furrowed ; medium ; smooti^ 



5. Upper part of culm: solid; semi-solid; hollow. 



6 "Wall of culm: thick ; medium ; thin. 



7 Color of culm : light yellow ; yellow ; purple ; bronzet 

 ^ Foliage: scanty; medium abundant 



