420 MONOCOTYLEDONOUS PLANTS. 



lindric-ovate, hairy at the base ; the lower one awned at the 

 tip. Scales linear-elongated. Flowers panicled. 



Triandria. Monogynia. 



0. aspertfolia Mich. : culm nearly naked ; leaves erect, rigid, pun- 

 gent at the point ; flowers in a racemose panicle. 



HAB. Mountain meadows. N. S. N. to Subarc. Amer. April, 

 May. If. Culm 18 inches high, purple at base. Panicle very 

 simple, flexuous. Mountain A'tVc. 



ORDER CXXXIX. CYPBRACE^E. Brown. Lind. 



Flowers monoclinous or diclinous, consisting of imbricated 

 solitary bracts, very rarely enclosing other opposite bracts at 

 right angles with the first, called glumes. Perianth none, un- 

 less the glumes when present be so considered, or the hypo- 

 gynous setae. Stamens hypogynous, definite, 1 152; an- 

 thers fixed by their base, entire, 2-celled. Ovary 1- seeded, 

 often surrounded by bristles called hypogynous setae, probably 

 constituting the rudiments of a perianth; ovule -erect} style 

 single, trifid or bifid ; stigmas undivided, occasionally bifid. 

 Nut crustaceous or bony. Albumen of the same figure as the 

 seed ; embryo lenticular, undivided, enclosed within the base 

 of the albumen ; 'plumula inconspicuous. 



Roots fibrous. Stems very often without joints, 3-cornered 

 or taper. Leaves with their sheaths entire. 



Div. I. True CYPERACEJS. 



1. CYPERUS. Linn. 



Spikelets compressed, distinct. Glumes imbricated in two 

 rows, nearly all enclosing flowers. Style deciduous. Nut 

 1, without bristles at its base. Triandria. Monogynia. 



1. C. tenettus Linn. : culm capillary ; spike solitary and in pairs ; 

 involucre 1 -leaved. C. minimus Thurb. 



HAB. N. J. and Penn. This minute species has been found in 

 Monmouth county, N. J. by Mr. Z. Collins on the Delaware, 

 near Philadelphia, by Dr. Isaac Cleaver. See Bart. Fl. Phil. i. 

 26, and Nutt. Gen. i. 35. 



2. C. fasdculatus EH. : spikelets ovate-oblong, many-flowered, in 

 terminal fascicles ; involucre 2-leaved, and with the leaves linear and 

 very narrow. 



HAB. Shores of the Delaware. Schweinitz. S. to Geor. Culm 

 6 inches high, 3-angled. Leaves 12, almost setaceous. Spike- 

 lets 5 7, sessile, many flowered. 



