424 MONOCOTYLEDONOUS PLANTS. 



* Seed with bristles or hypogynous seta at the base. 

 t Spikes terminal, solitary. 



1. S. palustris Linn. : culm terete, inflated ; spike oblong-lanceolate; 

 glumes somewhat obtuse ; seed roundish, punctate and rugose ; brits- 



, ties scabrous. 



HAB. Marshes and low meadows. N. Y. to Car. N. to Arc. 

 Amer. June. If. Culm 12 feet high, erect, leafless, with 

 3 sheaths at base. Spike sometimes oblique, the lower glumes 

 larger. Club Rush. 



2. & capitiitus Linn. : culm terete or somewhat compressed ; spiko 

 ovate, obtuse ; seed oval, compressed, smooth. 



HAB. Bogs and meadows. N. Y. to Car. July, Aug. If. 

 Culms cespitose, erect, 818 inches high. Spike very obtuse, 

 sometimes nearly, globose. Glumes round. Bristles 6, as long 

 as the glumes. 



3. S. tuberculosus Mich. : culm columnar, striate ; glumes very ob- 

 tuse, loosely appressed ; nut somewhat 3-angled ; tubercle sagittate, 

 larger than the nut. 



HAB. Wet grounds. N. J. Schiceinitz. S. to Car. July. If. 

 Culm 12 inches high, sheathed at base with 1 or 2 scales. 

 Spike ovate-lanceolate. Bristles 6, as long as the tubercle. 



4. S. acicularis Linn. : culm setaceous, quadrangular ; spike ovate, 

 acute, 3 6-flowered ; glumes somewhat obtuse ; stamens 3 ; style 

 bifid ; seed obovate. 



HAB. Margins of ponds. N. Y. to Car. June, July. It- Culm 

 3 6 inches long, cespitose. Spikes about 4- flowered. Brittle 

 4, rarely wanting. 



5. S. intermcdivs Muld. : culms cespitose, quadrangular, sulcate ; 

 spike ovate-oblong, acute ; glumes rather acute ; stamens 3 ; style 2- 

 clefl ; seed broad-obovate, compressed ; tubercle distinct. 



HAB. Marshes and swamps. N. S. Sept. If. Root creeping. 

 Culms slender, 3 4 inches long. Spikes dark brown. Bristles 

 6, longer than the seed. Closely allied to the preceding. 



6. S. cespitosus Linn. : culms cespitose, terete ; spikes ovate, few- 

 flowered ; lower glumes bracteiform, as long as the spike ; sheaths 

 with rudiments of leaves. 



*. callosus Big. : glumes thickened and cartilaginous at the tips. 

 HAB. White Hills, N. H. Big. Arc. Amer. July. It- Culm 



8 inches high, slender. Spike 4 5-flowered, compressed. 



Glumes with whitish tips. 



7. S. capillaceus Mich. : culm minute, capillary ; spike oblong-ovate, 

 acute, few-flowered ; glumes linear, acute ; seed compressed, obovate. 

 & pusillus Vahl. ? Pursh. 



HAB. Salt marshes. N. Y. to Car. July. . ICulm 13 

 inches high, slightly furrowed. Nut crowned by a conic^ubercle. 

 Bristles 6. Grows in large patches like moss. 



8. S. glaucescms Wittd. : culm angular, compressed, glaucous ; spike 



