GRAMINE^. (grass family.) 661 



2. E. Fr^nkii, Meyer. Much branclied and diffuse (3-8' lii^h) ; panicle 

 ovate-oblong, rather dense, spreading ; spikelets 2 - 5-Jioivered ( 1 - 1^" long), o« 

 slender pedicels ; glumes ren/ acute; the flowering one ovate, acute, TdtXhe^v oh- 

 scurely 3-nerved. — Low or sandy ground, S. Penn. to Kan., and southwest- 

 ward. Aug. 



3. E. Purshii, Schrader. • Sparingly branched at the decumbent base, 

 then erect (^-2° high); panicle elongated, the branches widely spreading, 

 very loose ; spikdets 5 - ISfloicered, oblong-lanceolate, at length linear (2 - 4-^'' 

 long), mostlij much shorter than their capillary pedicels ; glumes all ovate and 

 acute, or the flowering ones acutish, 3-nerved. — Sandy or sterile open grounds, 

 Penn. to Mo., and southwestward ; also introduced northward. 



•:- -!- Culms simple, or branching only at the very base,flrm, erect, mostly form- 

 ing thick tufts ; leaves very long ; panicle very large, compound, often longer 

 than the culm, with elongated loosel y flowered branches, their axils often 

 bearded. {Doubtful perennicds, or n. 5 annual.) 



4. E. tenuis, Gray. Panicle virgately elongated (1 -2^° long), very loose, 

 the spreading branches bearded in some of the lower axils, their remote divisions 

 and long diverging pedicels capillary; spikelets 2-6- (sometimes 7 -12-) flow- 

 ered, pale or greenish; lower glum.es lanceolate or awl-shaped, very acute (1^- 

 2" long), membranaceous, as are the oblong-lanceolate acute flowers ; flowering 

 glume distinctly 3-nerved ; the upper ciliate-scabrous. — Sandy soil, Ohio to 111., 

 Kan., and southward. Aug. -Oct. — Leaves rather rigid, 1^-2° long, gla- 

 brous or sparingly hairy ; the sheaths hairy or glabrous ; the throat strongly 

 bearded; flowers much larger than in the next, fully 1^" long. 



5. E. capillaris, Nees. Panicle widely expanding, usually much longer 

 than the culm, its spreading branches (mostly naked in the axils) and long 

 diverging pedicels capillary; spikelets rather terete, very small, 2-4-flowered, 

 greenish or purplish ; glumes and flowers ovate, acute (less than 1" long) ; flow- 

 ering glu7ne obscurely 3-nerved, scarcely keeled ; the palet rough-ciliate. — Sandy 

 dry soil and fields ; common, especially southward. Aug., Sept. — Leaves and 

 sheaths very hairy, or nearly glabrous ; the former about 1° long, not rigid ; 

 panicle 1-2° long, soon diffuse. 



6. E. pectinacea, Gray. Panicle ividely difl'use, its rigid divergent main 

 branches bearded in the axils ; the capillary pedicels more or less appressed on 

 the secondary branches ; spikelets flat, 5 - 15-flowered, becoming linear, purple 

 or purplish ; glumes and flowers ovate or oblong-ovate, acutish ; flowering 

 glume strongly 3-nerved ; palet hirsute-ciliate. — Leaves long, rigid, mostly hairy, 

 the sheaths especially so; plant 1-3° high; spikelets 2-3" long, 1" wide, 

 closely flowered. — Var. spectAbilis, Gray. Leaves and sheaths mostly gla- 

 brous; branches of the panicle (the lower reflexed with age) and pedicels 

 shorter; spikelets rather larger. — Sandy dry ground, from E. Mass. near the 

 coast, and from Ohio and 111., southward. Aug. -Oct. 



7. E. campestris, Trin, Glabrous or the sheaths villous at the throat ; 

 culm short, bearing an elongated and very open panicle with divaricate branches 

 bearded at base; spikelets linear, flat, 8- 12-flowered, sessile or nearly so along 

 the branchlets ; glumes very acute or acuminate, 3-nerved, roughish on the keel ; 

 palet minutely ciliate. (E. pectinacea, var. refracta, Chapm. Poa refracta, 

 Ell.) — Del. and Md. to Fla. and Ala. 



