1)60 COMPOSITE. 



6. E. rotundifolium, L. Round-leaved Thoroughwort. 



Downy-pubescent ; leaves opposite, sessile, roundish-ovate, obtuse, sub-cordate at 

 base, 3-nerved, veiny, roughisb, coarsely serrate; heads about 5-fiowered, in large 

 and dense corymbs ; scales of the involucre linear-lanceolate, slightly pointed. 



Dry soil. Aug., Sept. A slender species 2 to 3 feet high. Leaves sprinkled with 

 resinous dots 1 to 2 inches long, % as wide, sometimes almost orbicular, mostly 

 obtuse. Flowers white. Pappus longer than the corolla. Styles much exsertcd. 



7. E. pubescens, Muhl. Hairy Thoroughwort. 



Pubescent; leaves . ovate, opposite, sessile, acute, obtusely dentate, somewhat 

 3-nerved, veiny; involucre 7 to 8-fiowered, with lanceolate, acute scales. 



Dry grounds. Aug., Sept. A large rough plant, 3 to 4 feet high, with the lower 

 branches opposite. Leaves thin and slightly scabrous, slightly truncate at the 

 base. Involucre of about 12 scales, the outer shortest. Flowers white. 



8. E. sessilifolium, L, Sessile-leaved Thoroughwort. 



Stem smooth, branching; leaves opposite, sessile, distinct, roundish-ovate or 

 lanceolate, somewhat clasping the stems, smooth, serrate; involucre 5 to 12-flow- 

 ved, with oval and oblong obtuse scales. 



Rocky woods and banks. Sept. Stem slender, erect, branching at top. Leaves 

 large, somewhat truncate at base, tapering regularly to a long point, minutely 

 dotted beneath. Flowers white, in a widely spreading terminal corymb. 



9. E. RESINOSUM, Torr. Resinous Thoroughwort. 



Minutely velvety-downy ; leaves linear-lanceolate, elongated, closely sessile or 

 clasping at the base, serrate, slightly veiny beneath ; corymb fastigiate, compound ; 

 heads 10 to 15-flowered, with obtuse hoary-tomentose scales. 



Wet sandy soils. Aug., Sept. Stems 2 to 3 feet high, growing in tufts. Leaves 

 4 to 6 inches long, % to y 2 inch wide, membranaceous, viscid with resinous glo- 

 bules. Heads very numerous, rather small. 



10. E. perfoliatum, L. Thoix>ughwort. Bonesett. 



Stem stout, hairy ; leaves lanceolate, connate-perfoliate, tapering to a slender 

 point, serrate, very veiny : corymbs compound ; heads 8 to 10-flowered, with linear 

 lanceolate scales. 



Low grounds, meadows ; abundant. Aug. A well known, common plant 2 to 4 

 feet high, hairy or woolly, branched at the top. Leaves large, united at the ba=G 

 around the stem, the two measuring from S to 14 inches in length, Heads in large 

 clustered corymbs. Flowers white. Medicinal. 



* * Leaves opposite ; flowers white, 8 to 30 via Jicad. 



11. E. ageratoides, L. Nettle-leaved Thoroughwort. 



Smooth, branching: leaves opposite, on long petioles, broadly ovate, pointed, 

 coarsely and sharply toothed ; heads 12 to 20-flowered, with narrow lanceolate scales ; 

 corymbs compound. 



Rich woods and rocky hills ; common. Aug., Sept. Stem 2 to 3 feet high, some- 

 what branched. Leaves on petioles 1 to 2 inches long, sometimes slightly cordate, 

 3 to 6 inches long, 2 to 4 wide. Heads numerous, in small clusters, forming a v 

 compound corymb. Flowers pure white, somewhat fragrant. 



12. E. AROUA.TICUM, L. Aromatic Thoroughwort. 



Smooth or nearly so ; stem terete pubescent, nearly simple; leaves opposite, on 

 short petioles, ovate, rather obtusely toothed, acuminate, 3-nerved; corym b some- 

 what panickd ; heads about 20-flowercd. 



Low woods. Aug., Sept. Stem about 2 feet high. Leaves 2 to 4 inches long, I 

 to 2 wide, on petioles ^ to 1 inch long. Heads of the flowers large. Involucre 

 with 10 to 12 linear, acute, equal scales. Flowers in email corymbs, large, wbitv 

 and aromatic. 



