428 Obdee to.— OOMPOSIT:/®. 



lucre nearly in one row and equal; papptis generally simple. — Herbs 

 ■with alternate Ivs. Eays cyanic. Disk yellow. 



§ Eaya mitiute, shorter thnn the cylindrical involucre. Pappus fiimple. ..!.„. Nos. 1, 2 



§ l^ays long, showy, SO to 40. Pappus simple. Leaves all raiiical No. 8 



§ Eays long, showy, 50 to 200. — Pappus simple. Leaves clasping....' Nos; 4—6 



— ^Pappus double. Leaves sessile, &c Nos. 7—9 



X E. Canadense L. Invol. oblong ; rays numerous (40 — 50), crowded, minute ; 

 pappus simple ; st. hairy, paniculate ; Ivs. lanceolate, lower ones subserrate. — A 

 Vely common annual plant of no beauty, growing by roadsides and in fields, 

 throughout N. Am. Stem J — 9f 1 high, branching, hairy and furrowed. Leaves 

 very narrow, with rough edges. Kowers white, very numerous, small, of mean 

 appearance, irregularly racemous upon the branches, and constituting a large, ob- 

 long panicle. The plant varies greatly in size, according to the soil. — A starved 

 form is E. pusillum Nutt. 



2 E. divarioatum Mx. Decumbent and diffusely branched, hirsute ; Ivs. linear 

 and subulate ; hds. very small, loosely corymbous ; rays minute. — Dry Soil, V. 

 States S. to La. Plant of a greyish or bluish aspect, 3 — 6' high,, but at length 

 spreading 1 — 2f. Leaves 4 — 12" by -ji — 1". Rays purplish. Juno — Aug. 



3 E. nudicaule Mx. Glabrous ; Ivs. obovate or spatulate, radical, rosulate, en- 

 tire ; one or two sessile, bract-like on the simple stem or scape ; hds. few, corymb- 

 ous; invol. hemispherical; rays narrow, 30 or more, conspicuous. — Pine barrens, 

 Ta. to Fla. and La. Lvs. about 2' long. Scape 18' high, very slender. Eays 

 white. May, Jn. 



,4 E. belliditolium Muhlenb. Robins' Pl-Antain. Hirsute; radical lvs. obo-' 

 r.- Tate, obtuse, subserrate ; st. lvs. remote, mostly entire, lance-oblong, acute, clasping ; 

 ; 'J hds. 3 — 'i, in a close, terminal «etfce^ ; rays 50 to 60, nearly twice longer than the 

 .«- involucre, linear-spatidate. — Di?y fields and thicktts, TJ. S. and Can. Stem erect, 

 -- simple, sometimes stoloniferous, 1 — 2f high. Leaves 2 — 3' by 6 — 9", mostly 

 broadest above the middle. Rays bluish (rarely reddish)-purple. This is our ear- 

 liest species, flowering in May and- Juno. Resembles the following. (B. pulehel- 

 lum Mx.) 



5 B. Philadelphictim L. Pubescent or hirsute; lvs. thin, lower spatidale, ere- 

 nate-dentate, upper oblong-oblanoeolate, narrowed to the clasping (sometimes cor- 

 date-auriculate) base, subserrate ; hds. few, on long, slender ped. ; rays 150 to 

 200, filiform, more than twice longer than the invol. — "Woods and pastures 

 throughout N. Am. St. slender, 1 to 3f high. Lvs. 2 to 4' by 6 to 9", lower 

 much attenuated at base, upper acute. Eays reddish-purple or flesh-oolored, 

 nearly as slender as hairs. Jn. — Aug. 



/?. H1C-4.EDI. Cauliue lvs. cordate-ovate. Meriden, K. H. (Ricard). 

 y. St. stout, with coarsely serrate lvs., approaching the next. 



6 E. quercifolium Lam. Pubescent; rt. lvs. ohlong-obovate, lyraie-pimmaMfd, vr 

 deeply sinuate-toothed, the cauline sharply serrate, clasping; upper entire; hds. 

 small, numerous, corymbous, with innumerable filiform rays, twice longer than 

 the invol. — S. Car. to Pla. and La. Differs from the preceding in its smaller and 

 more numerous hds. as weU as its lvs. Rays pale purple. Mar. Jn. 



7 E. dnnuum Pers. Common Pleabane. 'White-weed. Hirsute, with scat- 

 tered hairs, branching; lvs, coarsely serrate, the lowest ovate, contracted at base 

 into a winged petiole, stem leaves ovate-lanceolate, sessile, acute, the highest lan- 

 ceolate ; rays very numerous and narrow ; pappus double. — A common weed, in 

 fields and waste grounds, Can. to Penn. and Ky. Stem thick, 2 — 4f high, striate, 

 terminating in a large, diffuse, corymbous panicle of large heads. Rays white or 

 purplish, 100 or more, short. Jn.— Aug. (E. heterophyllum Muhl.) 



8 B. strigdsum L. Plant, rough, with short, appressed hairs, or nearly smooth; 

 lvs. lanceolate, tapering to each end, entire, or with a few large teeth in the middle, 

 lower ones 3-veined and petiolate ; pan. corj'mbous ; pappus double. — A rough 

 weed, in' grassy fields, Can. and V. S. St. about 2f high, slender, farrowed, With 

 close, short, stiff hairs, and bearing a large, loose corymb. Lvs. also with close- 

 pressed bristles, sessile. Rays, very narrow, white. Jn. — Oct. 



/3. St. simple, smooth; Iva. entire, pubescent; fls. oorymbed; rays 100 to 150. 

 (E. integerrifolium Bw.) 



