ORDER TO. COMPOSITE. 417 



linear and entire. Cor. dilated at mouth, with short, obtuse lobes, white. Aug. 



Oct. (E. glaucescens /?. leucolepis DC.) 



10 E. hyssopifplium L. Lvs. opppsite, often verticillate, linear-lanceolate, ob- 

 scurely tripli-veined. punctate, lower ones subserrate, upper ones entire; scales short, 

 oval, grayish pubescent, very obtuse. A more delicate species, smooth, or minutely 

 pubescent, in dry tields, Mass, to Iowa and La. St. about 2f high, branching 

 into a spreading corymb. Hds. 5-flowered, very small, in dense clusters, and 3" 

 long, scales half as long. Aug., Sept. ft. linearifolium is more pubescent, will) 

 the lower Ivs. serrate. South. 



11 E. cuneifolium Willd. Pubescent ; Ivs. small, glaucous both sides, broadly 

 oblanceolate or oblong, obtuse at apex, acute at the subsessile base, slightly serrate 

 above the middle; lids, small, in a loose corymb, 5-flowered; scales (2'' long) 

 soft-villous, obtuse, much shorter than the fls. Rich shady soils, S. Car Ga. to 

 Ala. St. 1 to 2f high. Lvs. 8 to 18" long. Fls. white. Aug., Sept. 



12 E. parviflorum Ell. Soft-puberulent, diffusely branched ; Ivs. mostly oppo- 

 site (in 3s below), lanceolate, acute, acutely serrate above the middle, entire be- 

 low, and tapering to the sessile base. 3-veined ; hds. small and crowded ; scales 

 pubescent, glandular (like the 3 preceding), outer very short, inner linear, obtuse. 

 Low grounds, Va. to Fla. and La. Height 1 to 3f. Pan. compound, loose. Lvs. 

 1 to 3' long, the upper scattered. Hds. about 2'' long, scales 1". Aug. Oct. 



13 E. altissimum L. St. pubescent tomentous, tall, corymbous at the summit ; 

 Ivs. lanceolate, remotely and acutely serrate above the middle, pubescent, tapering 

 to each end, subsessile, conspicuously 3-veined; hds. 5-flowered; scaks 8 to 12, 

 elliptical, obtuse, pubescent. Woods and sandy soils, Penn. and W. States (Plum- 

 mer). St. round, striate, 3 to 7f high. Lvs. 3 to 4' long, much resembling those 

 of Solidago Canadensis ; small ones often fascicled in the axils. Corymb com- 

 pound. Cor. whitish, nearly twice as long (5 ") as the scales. Sept., Oct. 

 (Kuhnia glutinosa DC.) 



14 E. teuciif61ium Willd. Lvs. opposite, sessile, ovate, rough, veiny, the lower 

 ones doubly serrate, upper ones subserrate or entire ; st. paniculate, pubescent, 

 with fastigiate, corymbous branches above ; scaks elliptical, faintly striate, rattier 

 acute. Mass, to La. Plant hairy, 2 to 3f high, with a somewhat panic-led co- 

 rymb of white flowers. The upper ivs. are often entire. Invol. 5-flowered, with 

 twice as many scales in 2 rows. Closely allied to the following, but is much 

 more rough. Aug. (E. verbenafolium MX. E. pubescens Pers.) 



15 E. sessilifolium L. Lvs. opposite, amplexicaul, ovate-lanceolate, rounded at 

 the base, very smooth, serrate ; st. smooth ; inner scales oblong-oliovate, obtuse. 

 Plant 2 to 4f high, in rocky woods, Mass, to Ind. and Ga. St. slender, erect, 

 branching at top into a corymb with white fls. Lvs. large, tapering regularly 

 from the somewhat truncate base to a long point, with small serratures, paler be- 

 neath. Flower-stalks downy. Hds. 5-flowered, with twice as many scales in 2 

 rows. Sept. 



16 E. rotundifdlium Willd. HOARHOUXD. Lvs. opposite, sessile, roundish- 

 ovate, subcordate at base, 3-veined and veinleted, coarsely serrate, scabrous above, 

 pubescent beneath ; hds. about 5-flowered ; inner scales acuminate, as long as the 



flowers. A bushy, compact species, in dry fields, N. J. and S. States. St. 2 to 3f 

 high, roughish. Lvs. 1 to 2' by 9 to 20", obtuse or broadly acute. Hds. fastigi- 

 ate-corymboua. Invol. very pubescent, concealing the white florets. Pappus 

 longer than cor. Sty. much exserted. Aug. Sept. 



17 E. pubescens Muhl. St. hirsute; Ivs. opposite, sessile, distinct, ovate, acute, 

 obtusely dentate, rough-pubescent ; corymb fastigiate; invol. about 8-flowered; 

 scaks lanceolate, acute, rather shorter than the flowers. A large, rough plant, 3 to 

 4f high, growing on dry grounds. N. H. to Penn. Distinguished from No. 16 by 

 its larger Ivs. (2 to 3' by 11 to 2 '), hds., and proportionately shorter scales, which 

 are about 12, the outer much the shortest Aug. (E. ovatum Bw.) 



18 E. perfoliatum L. THOROCGH-WORT. BONESET. Lvs. connatc-perfoliate, 

 very pubescent. A common, well-known plant, on low grounds, meadows, U. S. 

 and Can., abundant. St. 1 to 5f high, round, rough, and hairy. Each pair of 

 Ivs. are so united at the base as to constitute a single lamina, centrally perforated 

 by the stem, and placed at right angles to it ; they are rough, rugose, serrate, 



27 



