GNETALES— WELWITSCHIA 



387 



In old plants the crown sometimes becomes cracked radially, from 

 the circumference almost to the center. Longitudinal cracks also 



Fig. 366. — WclwHschia mirahilis: A, young plants with entire leaves; B, older plant 

 with leaf splitting at tip; C, top view, showing depression between leaves; one-half 

 natural size. — After Hooker.^t^ 



appear in the stock, reaching from the leaf groove almost to the root, 

 but they are not so deep as those in the crown. 



