';5i Ordek 155.— CTPEEACE.^ 



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

 hedges, and has a specially rigid appearance. (0. festucaoea /3. Torr. Carey.) 



43 C. criatita Sohw. Spihekts 6 — 14, globous, sessile, closely aggregated into 

 an oblong, thick head of a crested form, braoteate ; perig. ovate, oblong, compressed, 

 winged, rosirate-aovm/inate, bifid, concavo-convex, scabrous on the margin, longer 

 than the oblong, lanceolate glume ; st. 1 — 3^ acutely triangular. — Plant yellow- 

 ish-green. Common in fields and meadows on colder soils. (C. lagopodioides j3. 

 Carey.) 



44 C lagopodioides Sohk. Spikelets 8 — 20, ieakless, green, ovate, rather 

 near, alternate and sessile ; perig. round-tonceoZafe, tapering at both ends, concavo- 

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

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

 (C. scoparia, /?. Torr.) 



45 C. tenera Dew. Spike compound, recurved ; spikelets ahout 5, ohovate, leiaotiBh, 

 alternate, sessile, attenuated below, the lowest braoteate ; fr. tawny, ovate, eom- 

 pres.%ed, somewhat winged, rostjraie, nerved, ciliate-serrate, longer than the ob- 

 long-lanceolate scale ; st. 16 — 30', small and slender, erect, with a nodding spike, 

 longer than the leaves. — Light green. Common. (C. straminea /3. Torr. C. 

 festuOacea /3. Carey. The inconsistency of these synonyms favors our own view 

 of this species.) • 



46 C festucaoea Sehk. Spike erect; spikelets 5 — 8, obovate and clubform, ses- 

 sila and alternate, approximate, lower one braoteate ; perig. tawny, rouncUsh-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 the S flowers, especially mark this 

 species. 



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

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

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

 culm 15 to 24', leafy towards the base. — R. I. (Olney) to L. Sup. and Brit. Am. 



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

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

 slightly margined, glabrous, longer than the lanceolate, acuminate glume; st 

 18 — 24', leafy towards the root — Moist places, very common. (0. ovalis Ell.) 



(8. AGeBEGATA Dew. Spikelets aggregated into a head, somewhat spiral. 



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

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

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

 the lance-ovato glume; plant short and very pale green. — N. T,, Jefferson Co. 

 (Boott 111 , 111), at Little PaUs (Vasey, Kneiskem). Remarkable for its slender, 

 beaked fruit 



50 C. drida Sohw. 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, acumimate, tvdce 

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

 mon in Ohio and Mich., 18 — 36', and further "W. and S. (0. Muskingummensis 

 Schw., scoparia, /?. Torr.) 



51 C. miliaris Mx. (B. t 181) Culm erect slender, rough above; Ivs. flat, 

 very narrow; S spike sessile, sometimes 2 and distant, ovoid, tawny; bract seta« 

 ceous, short; $ spike pale, rather long-peduncled ; perig. spheroidal, smooth. — 

 Marshes, Can., especially at L. Mistassins. 



52 C. Floridana Schw. ^ Spike short and sessile; i spikes 2 to 4, approxi- 

 mate, ovate, sessile, braoteate, the lowest sometimes a little recurved; perig. ob- 

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

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

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

 thrice longer than the culm ; plant pale green ; aoh^ oval, lens-shaped. — Pla. to La. 



