Bui. 365, U. S. Dept. of Agriculture. 
Plate VI. 
Fig. 1.— Cross Section of'Stem of Delphinium recurvatum. 
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Fig. 2.— Cross Section of Stem of Delphinium ajacis 
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m * ■ ■ ' ■__ ;^,v\^^o;::' '•■■ 
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Fig. 3.— Cross Section of Stem of Aconitum bakeri. 
