The Spiral Disposition of the Leaves. 529 



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Fig. 123. Dipsaciis sylvestris torsus. Two spirally twisted 

 main stems, zv, root ; r, stem with the scars of the radical 

 leaves and at i — 5 the windings of the spiral; g, stalk of 

 the terminal inflorescence ; A, leaf-spiral left hand, stem 

 riglit hand; B, leaf spiral right hand, stem left. Stems 

 thickened and hollow. 



