Fig. 360. — Ephedra trifurca: A, neck cell and central cell of arcliegonium; «, neck 

 cell; li, neck consisting of three tiers, central cell not yet divided; C, later stage, with 

 neck cells not easily distinguishable from surrounding cells; and central cell (c) still not 

 divided: A and B, X500; C, X 112. — After Land."" 



