126 BOTANY OF LA SALLE COUNTY. 



SCIR PUS. Bull Rush, Club Rush. Spikelets sev- 

 eral. 



S. pun gens. Sharply 3 angled, 1 to 4 ft. 

 S. laeus tris. Round; leafless, 3 to 9 ft. 



S. atro virens. L/eafy, 2 to 5 ft. 

 ERIOPH ORUM. Heads W., cottony when ripe. 



E. linea turn. Triangular, leafy, 1 to 3 ft.; leaves 

 flat. 



E. polystach yon. Rigid, 1 to 2 ft., somevvhat 3 

 sided. 



Hemicar pha suhsquarro sa. Erect, 1 to 5 inches; 



spikelets 2 to 3. 



CA REX. P. Sedges. Coarse, grass-like plants, 

 generally growing in wet or at least damp lands. 

 Stems jointed, mostly solid and 3 angled, leafy 

 or not; fls. in spikes, of two kinds both in same 

 spike or in separate spikes, on same plant or on 

 different plants. Fruit a hard seed in a sac-like 

 envelope. 



C. lurida. Obtusely angled, smooth; leaves long. 



C. hystri cina. Slender, sharply 3 angled. 



C. vesti ta. Stout, stiff, sharply angular. 

 Jh. C. stria ta. Sharply angled, longer than leaves. 



C. filiform is. Very slender, roundish, smooth. 



C. filiform is var. latifo lia. Rough; leaves flat. 



C. trichocar pa. Tall, sharp angled, rough. 



C. trichocar pa var. imbebris. Smaller. Dry 

 places. 



C. trichocar pa var. arista ta. Stouter, leaves 

 hairy. 



C. fusca. Bexbauni i of 5th Ed. Sharp angled, 

 roughish above; leaves very narrow, rough. 



C. stric ta. Tall, slender, in tufts, sharp angled, 

 rough. 



C. gris ea. Stout; leaves one-sixth in. wide; bracts 



