MONOCOTYLEDONOUS Oil ENDOGENOUS PLANTS. 589 



high, rigid, rough above, twice as long as the narrow 

 leaves; head or spike 1' long; bracts bristle-form, longer 

 than the spikes. Cache Creek. — Marcy. 



** Spikes with the lower flowers sterile, the upper fertile. 



C. STELLULATA, Good. Spikes 3-5, obovoid, distinct, the 

 uppermost club-shaped at the base; perigynia ovate, 

 rounded at the hase, tapering into a short and rough 

 2-cleft beak, finely nerved, spreading and finally recurved, 

 rather longer than the ovate pointed scale. (C. scirpoides, 

 Schk.) Shady river-swamps. Culms G'-12' high, weak; 

 leaves narrow and tender ; spikes small. 



Var., STERiLis. Sterile and fertile spikes on separate 

 culms, or some of them either sterile or fertile on the same 

 culm, otherwise like the preceding, and growing in similar 

 places. (C. sterilis, Willd.) 



Var., CONFERTA. Culms taller (2° high) and stouter; 

 spikes larger and more crowded ; perigynia round-ovate, 

 twice as long as the broadly ovate barely pointed scale. 

 Pine-barren swamps. 



C. STRAMINEA, Sclik. Spikes 3-6, distinct, ovoid ; pcri- 

 gynia ovate or round-ovate, broadly winged, abruptly nar- 

 rowed into a short 2-cleft beak, somewhat tawny and 

 spreading at maturity, longer than the ovate-lanceolate 

 scale. 



Var., FESTUCACEA. Spikes 6-8, pale, obovoid or some- 

 what club-shaped, scattered; perigynia ovate, less broadly 

 margined, tapering into a more slender beak, erect and 

 pale green at maturity, (C. festucacea, Schk. ; C. foenea, 

 Ton*., etc., a form with more rigid culms, and more crowd- 

 ed and glaucous spikes.) Swamps, very common. Culms 

 l°-2° liigh ; leaves narrowly linear, shorter than the 

 culm. Trinity River. 



