436 MONOCOTYLEDONOUS PLANTS. 



HAB. Sandy plains. Mass. June. It- Culm 1218 inches 

 high, small, stiff and scabrous. Spikes 3 7, ovate, approxi- 

 mate. Plant of a light green colour, and of a dried appearance. 



It Terminal spikes androgynous ; tfie rest pistilliferous ; stigmas 3. 



38. C. virescens Muhl. : spikes 3, oblong, erect ; upper one pedun- 

 culate, sterile below, the rest fertile, subsessile and bracteate ; fruit 

 ovate, obtuse, costate, pubescent. 



b. costata 8. <$ T. : spikes larger ; fruit strongly costate ; exterior 

 sheaths purple. 



HAB. Dry woods. Can. to Car. May. U.Culm 1824 

 inches high. Leaves and sheatlis pubescent- Spikes approxi- 

 mate. Plant dull green. Var. b. is larger in all its parts. 



39. C. hirsuta JVUld. : spikes 3, erect, approximate, densely fruited, 

 upper one ovate-oblong, on a short peduncle ; the rest ovate, subses- 

 eile, bracteate; fruit roundish-ovate, nerved, obtuse, smooth, orifice 

 entire, longer than the ovate acuminate glumes ; leaves and sheaths 

 pubescent. 



HAB. Rocky woods and meadows. Can. to Geor. W. to Mich. 

 May. L. Culm 12 18 inches high. Fruit pubescent when 

 young. Resembles C. virescens, but differs in its shorter and 

 thicker spikes and in the fruit being smooth when mature. 



40. C. buxbaumii Wold. : spikes about 4, obovate, subremote, upper 

 one androgynous and pedunculate, the rest sessile, with very long 

 bracts ; fruit ovate, obtuse, rather compressed, orifice entire, shorter 

 than the ovate acuminate (brown) glume. 



HAB. Swamps. N. S. W. to Mich. June. 2/. Culm 2 feet 

 high. Glumes dark brown. Fnnt smooth, pale green. 



41. C. digitalis Muld. : spikes mostly 4, distant, slender, peduncu- 

 late, loosely-flowered, nodding; uppermost androgynous, fertile above ; 

 the rest all fertile ; fruit oblong, subtriquetrous, obtuse, smooth, longer 

 than the oblong mucronate glume. C. gracittima Dew. 



HAB. Wet meadows. N. Y. N. Eng. and Penn. W. to Mich. 

 May. 1(. Culm 18 inches high, slender, but erect. Spikes 

 linear and filiform. Plant smooth and pale green. 



42. C.formosa Dew. : spikes 4, oblong, thick, distant, on exsert pe- 

 duncles, nodding, uppermost one sterile at the base ; fruit oblong, tri- 

 quetrous, somewhat inflated, rather acute at each end ; orifice nearly 

 entire or 2-lobed, obscurely nerved, twice as long as the ovate acute 

 glume. 



HAB. Wet meadows. Mass. Dew* May. If. Culm 1218 

 inches high. Leaves sometimes pubescent. Plant yellowish- 

 green. Allied to the preceding, but differs in its acute fruit, 

 shorter and ovate spikes, &c. 



43. C. torreyana Dew. : spikes 4, filiform, pedunculate, somewhat 

 nodding, uppermost one sterile at the base ; fruit oblong, triquetrous, 



