754 ORDEB 155. CYPERACE^E, 



stiff, rough above, rather slender ; plant light green. Common about fences and 

 hedges, and has a specially rigid appearance. (C. festucacea j3. Torr. Carey.) 



43 C. cristata Schw. Spikdets G 14, globous, sessile, closely aggregated into 

 an oblong, thickhead of a crested form, bracteate; perig. ovate, oblong, compressed, 

 winged, rostrate-acuminate, bifid, concavo-convex, scabrous on the margin, longer 

 than tho oblong, lanceolate glume ; st. 1 3f, acutely triangular. Plant yellow- 

 ish-green. Common in fields and meadows on colder soils. (C. lagopodioides ft. 

 Carey.) 



44 C. lagopodioides Schk. Spikelets 8 20, beakless, green, ovate, rather 

 near, alternate and sossilo ; perig. round-lanceolate, tapering at both ends, concavo- 

 convex, nerved, bidentate, scabrous on the margin, nearly twice as long as tho 

 ovate-lanceolate glume; st. nearly 2 f, leafy; the whole light green. Common 

 (C. scoparia, ft. Torr.) 



45 C. tenera Dew. Spike compound, recurved; spikelets ab<jut 5, obovate, remotish, 

 alternate, sessile, attenuated below, tho lowest bracteate ; fr. tawny, ovate, com- 

 pressed, somewhat winged, rostrate, nerved, ciliate-serrate, longer than the ob- 

 long-lanceolate scale; st. 15- 30', small and slender, erect, with a nodding spiko, 

 longer than the leaves. Light green. Common. (C. straminea ft. Torr. C. 

 festucacea ft. Carey. The inconsistency of these synonyms favors our own view 

 of this species.) 



46 C. festucacea Schk. Spike erect; spikekts 5 8, obovate and clubform, ses- 

 sile and alternate, approximate, lower ono bracteate ; perig. tawny, roundish-ovate, 

 rostrate, winged, striate, 2-toothed, scabrous on the margin, longer than the ovate, 

 lanceolate glume; st. 15 30', erect and stiff, leafy below. Plant pale green. 

 Spikelets greenish to brown. Common in fields, but not abundant The club- 

 form spikelets from the decurrent scales of tho $ flowers, especially mark this 

 species. 



47 C. adusta Boott. Spikelets several, 4 to 8 or more, often not approximate, 

 tapering below in maturity ; perig. ovate-lanceolate, or ovate, long-rostrate, nar- 

 row-winged and serrulate, veined, scarcely bifid, as long and broad as the glume ; 

 culm 13 to 24', leafy towards the base. R. I. (Olney) to L. Sup. and Brit. Am. 



48 C. scoparia Schk. Spikelets 5 10, \isually 5 7, ovate, sessile, approximate, 

 the lowest with a long, deciduous bract ; perig. ovate-lanceolate, nerved, erect, 

 slightly margined, glabrous, longer than tho lanceolate, acuminate glume; st. 

 18 24', leafy towards the root. Moist places, very common. (C. ovalis Ell.) 



ft. AGGREGATA Dew. Spikelets aggregated into a head, somewhat spiral. 



49 C. sychnocephala Carey. Spikelets ovate, closely aggregated into a head 

 (as the name purports), sessile, slender, with long, leafy bracts; perig. ovate, very 

 long, lanceolate, or tapering into a long beak, with scabrous edges, a little longer than 

 the lance-ovate glume; plant short and very pale green. N. Y., Jefferson Co. 

 (Boott. Ill , 111), at Little Falls (Vasey, Kneiskern). Remarkable for its slender, 

 beaked fruit. 



50 C. arida Schw. and Torr. Spikelets oval-oblong, 5 10, somewhat tapering at 

 both ends, large and approximate, close-flowered, dry and chaff-like ; perig. lance- 

 linear, compressed, thin, distinctly winged, bidentate, nerved, acuminate, twice 

 longer than the ovate-lanceolate glume ; plant light green in all its parts. Com- 

 mon in Ohio and Mich., IS 3G', and further Sv. and S. (C. Muskingummensis 

 Schw., scoparia, ft. Torr.) 



51 C. miliaris MX. (B. t. 187.) Culm erect, slender, rough above; Ivs. flat, 

 very narrow; 5 spike sessile, sometimes 2 and distant, ovoid, tawny; bract seta- 

 ceous, short; <J spiko pale, rather long-pedunclcd ; perig. spheroidal, smooth. 

 Marshes, Can., especially at L. Mistassins. 



52 C. Floridana Schw. $ Spike short and sessile; ? spikes 1 to 4, approxi- 

 mate, ovate, sessile, bracteate, tho lowest sometimes a little recurved ; perig. ob- 

 long, tapering below, rather obovate, plano-convex, abruptly rostrate, short-bifid, 

 scabrous above and on the back, about as long as the ovate-oblong, red-edged, scab- 

 rous, cuspidate glume; culm 2 to 6', slender, 3 -sided; Ivs. radical, flat, twice to 

 thrice longer than tho culm ; plant palo green ; ach. oval, lens-shaped. Fla, to La. 



