( 318 ) 



stigrnas3; spikes dark-colored. Marin county. 

 Summer. 



9. C. NUDATA Bolander. Spikes unisexual, 

 the upper 6 , the rest ? (sometimes androgy- 

 nous) stigmas 2; 3 spike single ^sometimes an- 

 drogynous); utricle (perigynium) elliptic, com- 

 pressed, slenderly nerved. Tamalpais. Sum- 

 mer. 



10. C. AQUATILIS Wahl. Spikes unisexual?' 

 the upper 1-4 spikes <3 , the lower (2-5) ? ; 

 stigmas 2; utricle (perigynium) elliptic, stipi- 

 tate, nerveless. Wright's Station. Summer. 



11. C. SITCHENSIS Prescott. Spikes unisex- 

 ual; the upper 1-4 spikes 3 , the rest (3-5) ? ; 

 stigmas 2, utricle (perigynium) orbicular, tur- 

 gid, stipitate, coriaceous, nerveless. Presidio. 

 Summer. 



12. C. JAMESII Torr. Spikes unisexual; 

 upper 1-4 spikes $ , the rest (3-4) ? ; stigmas 2, 

 utricle (perigynium) oval, strongly nerved, ab- 

 ruptly ending in a 2-dentate beak; bracts about 

 the length of the stem. Sonoma. Summer. 



13. C. LACINIATA Boott. Spikes unisexual; 

 upper 1-2; spikes $ , the rest (3-4) $ ; stigmas 

 2, utricle (perigynium) oval, lenticular com- 

 pressed, bracts far exceeding the stem. Coast 

 Kange. Summer. 



14. C. GLOBOSA Boott. Spikes unisexual, 

 upper spike $ , rest (3-5) ? ; stigmas 3; utricle 



