EXERCISE XXXIV. 

 IDENTIFICATION OF LEGUME SEEDS. 



Supplies for a Laboratory Section of Twelve. Twelve small vials of each of the following: crimson clover, 

 common alfalfa, burr clover, yellow trefoil, white sweet clover, white clover, alsike clover, red clover, and small 

 yellow annual sweet clover. Twelve small vials of poor quality alfalfa .seed. Twenty-four plates to be used as 

 germinators. A few sheets of blotting paper. Twelve tripod magnifiers. 



Part A. Detection of Adulterants and Substitutes. 



1. In answering the following questions, hit upon one to five (preferably two or three) 

 important and strongly distinguishing points of difference. In recording these points of dif- 

 ference, use the accompanying "Comparison Blank." Keep your observations on points, in 

 which comparison is made, on corresponding lines in the two parallel columns. 



Note, for example,, how comparison is made between white clover and alsike clover, as 

 called for in the first question. 



(a) 

 (b) 

 (c) 

 seed? 

 (d) 

 (e) 

 (f) 

 (g) 

 (h) 



How can alsike clover seed be detected in white clover seed? 



How can red clover seed be detected in "alfalfa seed? 



How can small yellow annual sweet clover seed be detected 



white sweet clover 



How can white sweet clover seed be detected in alfalfa seed? 

 How can crimson clover seed be detected in alfalfa seed? 

 How can yellow trefoil seed be detected in alfalfa seed? 

 How can burr clover seed be detected in alfalfa seed? 



If the seed of either white sweet clover or small annual yellow sweet clover is pres- 

 ent to any extent in any other seed, in what very simple way can the fact be detected? 

 (i) Which of all the seeds under study is it most difficult to identify? 

 (j) Why is this the case? 



COMPARISON BLANK FOR LEGUME SEEDS. 



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