852 ENDOGENOUS PLANTS 



Obs. I have only met with this in a swamp, near a cold shaded 

 Spring, in the meadow of the farm where I was born ; in which 

 locality it is abundant, and of luxuriant growth. 



g7. Perigynia slightly inflated, smooth and shining; staminate spikelet solitary; 

 pistillate spikelets all pendulous on slender peduncles. 



30. C. debilis, MX. Staminate spikelet narrow-linear, on a 

 short filiform peduncle ; pistillate spikelets 3 to 5, often 4, loose- 

 flowered, with a flexuose rachis ; perigynia oblong, tapering at each 

 end, about twice as long as the ovate-lanceolate mucronate scale, 

 the beak slender, bifid. 



C. flexuosa. Muhl. $ Fl. Cestr. ed. 2. p. 39. 

 WEAK CAREX. 



Culms 1 to 2 feet long, slender, weak, and often procumbent in age, leafy. Leaves 

 narrow, the upper ones, or bracts, equalling the culm, the lower ones shorter. 

 Ktam. spikelet 1 to 1% inches long, rarely with a few pistillate florets at summit. 

 P siittate spikelets 1% to near 3 inches in length, ^usually 3 somewhat approxima- 

 ted near the summit, and 1 or 2 distant below. 

 Sab. Moist woods, and low ground: frequent. F^June. Fr. Aug. 



8. Perigynia slightly inflated, rough, or woolly ; staminate spikelets usuaUy2,or 

 more. 



31. C. 1 aim Jjiii lisa, MX. Pistillate spikelets 2 or 3, cylindric- 

 oblong, rather distant, the tipper ones sessile; perigynia ovoid, 

 abruptly beaked, densely roughish-pubescent, about as long as the 

 lance-ovate cuspidate scale. 



C. pellita. Muhl. $ Fl. Cestr. ed. 2. p. 41. 

 WOOLLY CAREX, 



Culms \% to 2 feet high, striate, leafy. Leaves rather narrow,, nearly flat, erect, 

 long-acuminate, about as long as the culm. Stam. spikelets 2 or 3 (rarely 1), % to 

 an inch and a half long, the upper one pedunculate. Pistillate spikelets 1 to near 

 2 inches in length, erect, the upper one sessile, the lowest on a short or some- 

 times rather elongated peduncle ; bracts foliaceous, surpassing the culm. Beaks 

 cf the perigynia short, bicuspidate at apex. 

 Hab. Moist grounds ; Serpentine bank : not common. Fl. May. Fr. July. 



$ 9. Perigynia usually inflated,, sm'wth, witfi a long tapering beak ; staminate spike- 

 let solitary. 



f Bracts foliaceous, with short, or obsolete sheaVis. 



32. C. hystricina, Wittd. Pistillate spikelets 2 or 8, cylin- 

 dric-oblong, dense-flowered, the upper one on a short peduncle, 

 the lower ones finally nodding on long slender peduncles ; perigynia 

 ovoid- oblong, spreading,, twice as long as the oblong emarginate 

 awned scale, the beak with smooth teeth. 



PORCUPINE-LIKE CAREX. 



Plant pale or yellowish green. Culm 1% to 2 feet high, leafy. Leaves laneo. 

 linear, the upper ones, or bract*, surpassing the culm. Stam. fpikelet about an 

 inch and half long, with a subulate-linear bract at base, and &ped-uncU 1 to 2 or 2 

 inches in length. Pistillate spikelets 1 to 2 inches long, and half an inch in diam- 

 eter, the lowest on a peduncle 2 to 4 inches long. 

 Hab. Wet meadows, and low grounds : freiueat. FL May. Fr. July. 



