Fig. 



1. Inflorescence of Carex aperta Boott; specimen from Columbia 



Eiver, Washington ; natural size. 



Fig. 2. Inflorescence of C. aperta forma concinnula nob.; specimen from 

 Mt. Paddo, Washington; natural size. 



Fig. 3. Inflorescence of C. aperta forma liydroessa nob.; specimen from 

 Columbia Eiver, Washington; natural size. 



Fig. 4. Perigjnium and squama of typical C. aperta; enlarged. 



Fig. 5. Pistillate squama from near the base of the lowermost spike of 

 C. crinita Lam. ; enlarged. 



Fig. 6. Perigynium of same; enlarged. 



Fig. 7. Pistillate squama from near the base of the lowermost spike of 

 C. gynandra Schw. ; enlarged. 



Fig. 8. Perigynium of same; enlarged. 



