v^- 



Rxplanation of J'ip;ures. 



All fisui'es wei'o di'awn with Zeiss Camera Luc Ida, 

 and are of Hamamelis virginiana, unloss othei'wise stat- 

 ed. 



Fig. la - Id. Development of epidermal hair taken from 



sepal X 440 

 Fig. 2a - Mature hair in cross-soct ion x 440. 

 Fig. 2b - . Mature hair in Longitudinal section x440 

 Fig. 3. - hail- from tip of sepal X440. 

 Fig. 4. - f!rov/ing staiien. Longitudinal section 



X1090, beginning of archesporial devel- 



opmont. 



Fig. 5. - Oi-o'ving stamen cross- sect ion xl090. 



Archesporium. Tapetal liy^r. Thick- 

 ness of anther wall. 



