PLATE 40 
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ANNULAR AND SPIRAL VESSELS 
. Pumpkin stem (Cucurbita pepo, L.). 
. Two characteristic views of spiral vessels. 
. (A) Upper part of spiral vessel in focus. 
(B) Under part of spiral vessel in focus. 
4. Spiral vessel of the disk petal matricaria (Matricaria 
chamomiulla, L.). j 
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Wn 
