754 Okdee 155.'— CYPERAOB^ 



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

 hedges, and has a specially rigid appearance. (C. festucacea /3. Torr. Carey.) 



43 C. crlst^ta Sohw. Spikelets 6 — 14, globous, sessile, closely aggregated into 

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

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

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

 ish-green. Common In fields and meadows on colder soils. (C. lagopodioides /3. 

 Carey.) 



44 C. lagopodioides Schk. Spikelets 8 — 30, beakless, green, ovate, rather 

 near, altoruate and sessile ; perig. Tound-lanceolate, 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, /3. Torr.) '' 



45 C. tenera Dew. Spike compound, recurved ; spikelets abont 5, dboYate, xemotiah, 

 alternate, sessile, attenuated below, the lowest bracteate ; fr. tavmy, 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 spike, 

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

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

 of tins species.) 



46 C. festucacea Schk. Spike erect; spikelets 5 — 8, ohovate and clubform, ses- 

 s:l3 and alternate, approximate, lower one bracteate ; perig. tawny, roundish-ovate, 

 rostrate, winged, striate, 2-toothe'd, 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 $ flowers, especially mark this 

 spscies. 



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



48 C. scoparia Schk. Spilcelets 5 — 10, usually 5 — 1, 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. (G. ovalis Ell.) 



/?. AGGBEGATA Dew. Spikelets aggregated into a head, somewhat spiral. 



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

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

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

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

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

 beaked fruit. 



50 C. drida 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., 18 — 36', and further W. and S. (C. Muskingummensis 

 Schw., scoparia, /3. 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; S spike pale, rather long-peduncled ; perig. spheroidal, smooth. — 

 Marshes, Can., especially at L. Mistassins. 



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

 mate, ovate, sessile, bracteate, the 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 the culm ; plant pale green ; ach. oval, lens-shaped. — Fla. to L^ 



