428 ORDER 10. COMPOSITE. 



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

 with alternate Ivs. Rays cyanic. Disk yellow. 



Rays minute, shorter than tho cylindrical involucre. Pappus simple Xos. 1, 2 



| IJays loriir, showy, 30 to 4 >. Pappus simple. Leaves all radical No. 3 



Rays long-, showy, 50 to 200. Pappus simple. Leaves clasping Nos. 4 1> 



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



1 B. Canadense L. Invol. oblong; rays numerous (40 50), crowded, minute; 

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

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

 throughout N. Am. Stem ^ 9fl high, branching, hairy and furrowed. Leaves 

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

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

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

 form is E. pusillum ISTutt. 



2 E. divaricatum MX. Decumbent and diffusely branched, hirsute ; Ivs. linear 

 and subulate ; lids, very small, loosely corymbous ; rays minute. Dry soil, "W. 

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

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



3 E. midicaule MX. Glabrous ; Ivs. obovate- or spatulate, radical, rosulate, en- 

 tire ; one or two sessile, bract-like on the simple stem or scape ; lids, fow, corymb- 

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

 Va. to Fla. and La. Lvs. about 2' long. Scape IS" high, very slender. Kays 

 white. May, Jn. 



4 E. bellidifolium Muhlenb. ROBINS' PLANTAIN. Hirsute ; radical Ivs. obo- 

 vate, obtuse, subserrate ; st. Ivs* remote, mostly entire, lance-oblong, acute, clasping ; 

 hds. 3 7, in a close, terminal corymb; rays 50 to GO, nearly twice longer than tho 

 involucre, linear-spatulate. Dry fields and thickets, IT. 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 June. Resembles tho following. (E. pulchel- 

 lum MX.) 



5 E. Philadelpliicuxn L. Pubescent or hirsute; Ivs. tftin, lower spatulate, ere- 

 note-dentate, upper oblong-oblanceolate, 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 K Am. St. slender, 1 to 3f high. Lvs. 2 to 4' by G to 9", lower 

 much attenuated at base, upper acute. Rays reddish-purple or flesh-colored, 

 nearly as slender as hairs. Jn. Aug. 



/?. RICARDI. Cauline Ivs. cordate- ovate. Meriden, N". H. (Ricard). 

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



6 E. qiiercifolium Lam. Pubescent; rL Ivs. oblong-obovate, lyrate-pinnatifid, or 

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

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

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

 more numerous hds. as well as its Ivs. Rays pale purple, Mar. Jn. 



7 E. annuum Pers. COMMON FLEABAXE. WHITE-WEED. Hirsute, with scat- 

 tered hairs, branching; Ivs. 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, ia 

 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 E. strigosum L. Plant, rough, with short, appressed hairs, or nearly smooth ; 

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

 lower ones 3-veined and petiolate ; pan. corymbous ; pappus double. A rough 

 weed, in grassy fields, Can. and U. S. St. about 2f high, slen'der, furrowed, with 

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

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



)3. St. simple, smooth; Ivs. entire, pubescent; Ms. corymbed; rays 100 to 150, 

 (E. integrifolium Bw.) 



