338 MONOECIA.— TRIANDRIA. 



middle, acuminate at each eud, divergingly bifid ; 

 culm leafy. 

 HAD. Meadows. June. U . Culm 2— 3 ft. high ; 

 leav. dark green ; spik. gray. 



25. C. lagopodioides : spikes numerous, (10 — 16,) el- 

 liptic, crowded ; bract beneath the lowest overtop- 

 ping the culm ; fruit lanceolate, acuminate, erect, 

 bicuspidate, with a narrow serrulate margin, twice 

 as long as the ovate-lanceolate glume. 



HAB. Wet meadows. May. H . Spikes large, 

 at first subcylind. 



26. C. scoparia : spikelets mostly 5, (sometimes 6 or 



7,) ovate, sessile, approximate, aggregate, lowest 

 one bracteate ; fruit ovate-lanceolate, margined, 

 nerved, smooth, bicuspidate longer than the lan- 

 ceolate acuminate glume. 

 HAB. Wet meadows. May. U. Fruit not wing- 

 ed, tawny zvhen mature. 



27. C. straminea: spikes about 5, (4 — 7,) roundish, 

 approximate, with short bracts at the base ; fruit 

 roundish-ovate, rostrate, compressed, broadly- 

 ovate, bidentate, serrulate, longer than the lanceo- 

 late glume. 



HAB. Wet meadows. May. U . A foot high ; 

 spikes yellowish ; fr. acuminate. 



28. C. foznea: spikes numerous, (8 — 10,) inferior 

 ones distinct, upper ones aggregated and conBuent ; 

 fruit ovate, acuminated, winged, bidentate, some- 

 what longer than the ovate glume. 



HAB. Marshes. June. U . Culm obtusely triang. ; 

 spik. subglob. ; glumes rigid. 



29. C. cristata : spikes numerous, (8 — 15,) aggregated 

 into a kind of head ; fruit ovate-lanceolate, winged, 

 diverging, serrate, longer than the ovate-lanceo- 

 late glume. 



HAB. Wet thickets. June. H . Spik* crowded 

 into an ovate head. 



30. C.festucacea : spikes obovaie, (5 — 8.) subap- 

 proximate, bracteate ; fruit roundish-ovate, ros- 

 trate, bidentate, winged, serrulate on the margin, 

 longer than the ovate-lanceolate glume. 



HAB. Woods and meadows. May. U . Fruit green 

 or silver-gray, not becoming tawny. 



