268 



T. Holm — Studies in the Cyperacece. 



A variety pollens has been described by Fernald, with 

 scales green with pale brown or yellowish margins, and 

 this has also been reported from Finland by Hjelt (1. c.) ; 

 some specimens from Quebec, Ontario and Michigan 

 belong also to this variety. 



It is thus characteristic of C. Magellanica that all the 

 spikes, at least the lateral, are gynaecandrous, and at the 

 same time being tristigmatic the species must be consid- 

 ered as the most evolute of the grex: Aeorastachyce. 



Clinton, Md., August, 1921. 



Fig. 



Fig. 



Fig. 



Fig. 



Fig. 

 enlarged. 



Fig. 6. 

 enlarged. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



Fig. 10. 



Fig. 11. 



Fig. 12. 



Fig. 13. 



Fig. 14. 



EXPLANATION OF FIGURES. 



Inflorescence of Carex glaucescens Ell. natural size. 



Pistillate scale of same; enlarged. 



Utriculus of same; enlarged. 



Carex littoralis Schw. ; the inflorescence ; natural size. 



Pistillate scale of same, taken from the lower part of the spike; 



Pistillate scale of same, from the upper part of the spike; 



Utriculus of same; enlarged. 



Inflorescence of Carex stygia Fr. ; natural size. 



Staminate scale of same; enlarged. 



Pistillate scale of same ; enlarged. 



Utriculus of same; enlarged. 



Inflorescence of Carex laxa Wahlenb. ; natural size. 



Pistillate scale of same; enlarged. 



Utriculus of same; enlarged. 



