9-4 FLORA. 



20. Eupatorium aromaticum L. Smaller White Snake-root. (I. F. f. 

 3630.) Puberulent or glabrate, slender, branched at the summit, 3-7 dm. high. 

 Leaves opposite, petioled, firm, obtuse <>r acutish at the apex, rounded, cordate or 

 sometimes narrowed at the base, crenate-dentate, 4-7 cm. long, 18-35 mm - wide, 

 3-nerved and veiny; petioles 4-16 mm. long; inflorescence usually compact; heads 

 IO-25-flowered; involucre campanulate, 3-4 mm. high, its bracts linear, generally 

 obtuse; flowers white. In dry soil, Mass. to Fla. Aug. -Oct. 



21. Eupatorium coelestinum L. Mist-flower. (I. F. f. 3631). Pubes- 

 cent or puberulent, branched, 3-9 dm. high. Leaves opposite, petioled, ovate, 

 obtuse or acute at the apex, truncate at the base, or abruptly contracted into 



lie petiole, crenate-dentate, 4-7 cm. long, 18-35 mm - wide; heads 4-6 mm. high; 

 involucre broadly campanulate. its bracts linear-lanceolate, acuminate; flowers 

 Mae or violet. In moist soil, N. J. to Fla., 111., Kans., Ark. and Tex. Also in 

 Cuba. Aug. -Oct. 



5. WILLUGBAEYA Neck. [MIKANIA Willd.] 



Herbaceous twining vines, or some tropical species shrubs, with opposite, peti. 

 oled leaves, and discoid, mostly cymose-paniculate heads of white or pink flowers. 

 Heads 4-fiowered. Involucre oblong, of 4 slightly unequal narrow bracts. Recep- 

 tacle small, naked. Corolla regular, its tube slender, the limb campanulate, 

 5-cleft. Anthers entire and obtuse at the base. Style-branches elongated, acutish. 

 Achenes truncate, 5. angled. Pappus of numerous capillary roughish bristles in I 

 or 2 series. [Probably named in honor of Francis Willoughby, 1635-1672. Eng- 

 lish naturalist, but the name spelled by Necker as above.] About 150 species, of 

 Am. Besides the following another occurs in the southern U. S. 



1. Willugbaeya scandens (L.) Kuntze. Climbing Hempweed ok Boneset. 

 (I. F. f. 3632.) Glabrous or nearly so, 1. 5-4. 5 m. long. Leaves ovate or has- 

 tate, deeply cordate, acuminate, repand or obtusely dentate, 5-10 cm. long, 2-5 cm. 

 wide; petioles slender, shorter than the blades; heads in compound clusters borne 

 at the ends of the branches; involucre about 6 cm. long, its bracts lanceolate, 

 acuminate or apiculate; flowers white or pink; achenes resinous. In swamps and 

 moist soil, N. H. and Mass. to western Ont. and Ind., Fla. and Tex. Also in the 

 \V. Ind. and S. Am. July-Sept. 



6. COLEOSANTHUS Cass. 



Herbs or shrubs, with discoid heads of white, yellowish or pink flowers, i 

 panicles or cymes, or rarely solitary. Involucre campanulate or oblong, it> bract 

 striate, imbricated in several series, the exterior ones successively smaller. Rece 

 tacle naked. Corolla regular, 5-lobed. Anthers obtuse at the base. Styl 

 branches long, obtuse. Achenes 10-striate or 10-ribbed. Pappus a single row df 

 numerous rough or serrate bristles. [Greek, sheath-flower, j About 60 specie 

 lie-ides the following some 40 others occur in the southern and western U. S. 



1. Coleosanthus grandiflorus (Hook.) Kuntze. Large- flowered Thoi 

 OUGHWORT. (I. F. f. 3633.) Erect, glabrous or puberulent, much branche 

 6 dm. high. Leaves slender-petioled. deltoid-ovate, cordate at the base, acuml 

 nate at the apex. coarsely crenate-dentate, 5 10 cm. long. 2-5 cm. wide; heacjs 

 short-peduncled, 12-14 nim. long; peduncles pubescent; involucre campanulat 

 30 4.5 flowered, the outer bracts ovate, pubescent, usually abruptly acuminate or 

 subulate tipped, the inner linear, glabrous, striate. Mont, to Mo., Kans., N. Me; 

 to ( )re. and Ariz. Aug. -Sept. \BrickelliagrandiJloraN\\\.i.\ 



7. KUHNIA L. 



Perennial herbs, with alternate punctate resinous-dotted leaves, and discoi 

 heads of white or purplish flowers in terminal cymose corymbs. Involucre turbil 

 nate campanulate, its bracts striate, imbricated in several series, the outer shorter. 

 Corolla regular, the tube -lender, the limb 5-lobed. Anthers obtuse and entire at 

 the base, nearly or quite separate. St 5 de-branches slender, obtusish. Achenes 

 IO striate. 1'appus a single row of numerous very plumose bristles. [Named for 



Dr. Adam Kuhn, of Philadelphia, a pupil of Linnaeus.] About 8 species, of 



N. Am. and Mex. 



