172 COMPOSITiE. 



* Rays not exceeding the disk. 



1. E. Canarlense Linn. : stem erect, hirsute, profusely and paniculately 

 branched ; leaves lance-linear, mostly entire, ciliate, lower sometimes ser- 

 rate ; heads small, very numerous ; rays crowded, scarcely longer than the 

 cylindric involucre. 



J'ields and waste places. Can. to Flor. W. to Oregon and Texas. July — Oct. 

 (T). — Stem 6 inches to nearly 6 feet high, depending upon the soil, mostly very 

 hairy. Heads loosely racemose on the branches, forming an oblong panicle ; rays 

 white, narrow, scarcely longer than the pappus. When small it constitutes 

 E. pusillum of Nuttall. Horse-weed. 



** Rays longer than the disk. 



2. E. bellidifolium Muhl. : hairy and canescent ; radical leaves obovate or 

 spatulate, slightly serrate or entire; cauline sessile, scattered, oblong-lan- 

 ceolate ; heads few, large, corymbose ; rays very numerous, linear, twice as 

 long as the involucre. E. pulchellum Mich. 



Shady woods. Can. to Car. W. to Miss. June — Aug. %. — Stem 12 — 18 

 inches high. Heads large, 2 — 5 ; the lower peduncles elongated, rather slender; 

 raijs about 50, bluish-purple, sometimes nearly white. Roberfs Plaintain. 



* 3. E. Philadclphicum Linn. : stem pubescent, weak, corymbose at the 

 summit ; lower leaves cuneate-obovate, sometimes obtusely serrate, or in- 

 cisely toothed; upper clasping, usually entire; heads few, on elongated 

 pedicels; rays very numerous, capillary, twice as long as the involucre. 

 E. purpureum Ait. 



Woods and fields. Hudson's Bay to Flor. W. to Oregon and California. 

 Aug., Sept. %. — Stem 1 — 3 feet high, hairy or villous at base. Heads few, 

 middle-sized, in a loose corymb ; rays 100 or more, very narrow, pale purple or 

 flesh-color. Philadelphia Fteabane. 



4. E. annuum Pers. : sparsely hairy ; stem corymbosely branched above ; 

 lower leaves ovate, obtuse, coarsely toothed, tapering into a margine«4 peti- 

 ole ; upper cauline lanceolate-acute, serrate in the middle ; uppermost 

 usually entire ; rays very narrow, scarcely twice the length of the some- 

 what hispid involucre. E. heterophyllum Willd. Stenactis anmta and 

 strigosa D. C. 



Fields and meadows. Can. to Virg. W. to Ken. June — Aug. 0. ? — Stem 

 stout, 2 — 3 feet high, angular, more or less hirsute. Heads rather small ; rays 

 white or tinged with purple, narrow. A popular medicine. 



Annvxd Fleahane. Daisy. 



5. E. strigosum Muhl. .-stem slender, hairy, corymbose-paniculate at the 

 summit; leaves toothed or entire; lower spatulate-lanceolate, 3-nerved, 

 tapering to a long narrow petiole ; upper lanceolate or oblanceolate ; rays 

 narrow-linear, about twice as long as the hispid involucre. E. integrifo- 

 lium Big. E. ambiguum Nutt. Stenactis ambigua D. C. 



Fields and meadows. Can. to Flor. W. to Oregon. July, Aug. or @). — 

 Stem 1 — 3 feet liigh, angular. Heads rather small, in terminal corymbs at the 

 summit of the branches ; rays usually white, narrow, sublinear, the tube hairy. 



Strigose Fleahane. 



16. BOLTONIA. V Herit.—BoMomai. 

 (In honor oi James Bolton, a British naturalist and artist.) 



Heads many-flowered ; ray flowers in one series, linear, pis- 

 tillate; those of the disk tubular, perfect. Receptacle hemi- 



