APPLICATION OF VORTEX CONSTRUCTION. 59 



instead of radii as demanded by the Schimper-Braun theory, while 

 it is clear that any attempt to correct the Schimper construction 

 by demanding hypothetical displacement or torsion in the cone is 

 entirely unnecessary. The balance of evidence must fall on the 

 side which explains most facts with the least amount of straining. 



Fig. 27. — The same, with inscribed circles as representatives of tbe primordia. 



By inscribing " circles " in the " square " areas (fig. 27) the 

 diagram may be arranged to fit the case of spherical flower- 

 primordia, as in the inflorescence of Scabiosa atropurpurea, in 

 which the bracts are omitted ; while it is equally correct for the 

 androecium (8 + 13) of Helleborus niger, or for the bractless 



