Genus 4.] 



THISTLE FAMILY. 



307 



Leaves thickish, i'-2' long, blunt-toothed, acute or obtusish. 

 Receptacle conic; flowers blue or violet; leaves petioled. 



18. E. aroma ti cum. 



19. E. coeleslinum. 



i. Eupatorium capillifolium (Lam.) Small. Dog-fennel. 



(Fig. 3613.) 



Artemisia capillifolia Lam. Encycl. 1: 267. 1783. 

 Eupatorium foeniculoidcs Wa.\t. Fl. Car. 199. 1788. 

 E.foeniculaceum Willd. Sp. PI. 3: 1750. 1804. 

 E. capillifolium Small, Mem. Torr. Club, 5:3-11. 1894. 



Erect, paniculately much branched, with the 

 aspect of an Artemisia, the stem finely pubes- 

 cent, 4-io high. Leaves crowded, glabrous or 

 nearly so, alternate, pinnatifid into filiform seg- 

 ments, the lower petioled, the upper sessile; 

 heads very numerous, about i^" high, short - 

 pedicelled, racemose-paniculate, 3-6- flowered; 

 bracts of the involucre in about 2 series, linear, 

 cuspidate, narrowly scarious-margined, gla- 

 brous; flowers greenish white. 



In fields, Virginia to Florida. Also in the West 

 Indies. Sept. 



Hog-weed. 



oblong; heads smaller and fewer; plant low. 



2. Eupatorium maculatum I,. 

 Spotted Joe- Pye Weed. (Fig. 3614.) 



E. maculatum L- Amoen. Acad. 4: 288. 1755. 

 Eupatorium purpureum var. maculatum 



Darl Fl. Cest. 453. 1837. 



Similar to the following species, but sca- 

 brous or pubescent, often densely so, 2-6 

 high. Stem usually striate, often rough and 

 spotted with purple; leaves thick, ovate or 

 ovate-lanceolate, coarsely dentate, verticil- 

 late in 3's-5's, or the upper ones opposite; 

 inflorescence depressed, cymose-panicu- 

 late; pedicels and outer scales of the invo- 

 lucre pubescent; flowers pink or purple. 



In moist soil, New York to Kentucky, Minne- 

 sota, British Columbia, Kansas and New Mex- 

 ico. Called also Spotted Boneset. Aug.-Sept. 

 Eupatorium maculatum amoenum (Pursh) Brit- 

 ton, Mem. Torr. Club, 5: 312. 1894. 

 E. amoenum Pursh, Fl. Am. Sept. 514. 1814. 



Leaves opposite, or in 3's or 4's, ovate or 

 In dryer places, Virginia to New York. 



3. Eupatorium purpureum L,. Joe-Pye or Trumpet-weed 

 Tall or Purple Boneset. (Fig. 3615.) 



Eupatorium trifoliatum L. Sp. PI. 837. 1753. ? 

 Eupatorium purpureum L. Sp. PI. 838. 1753. 



Glabrous or sparingly pubescent, simple, or 

 branched at the summit, 3-io high. Stem green 

 or purple, terete or striate, usually smooth; leaves 

 thin, verticillate in 3's-6's, ovate, oval, or ovate- 

 lanceolate, petioled, acuminate, serrate, 4 / -i2 / 

 long, I'-?/ wide, glabrous or slightly pubescent 

 along the veins on the lower surface; inflores- 

 cence usually elongated; heads very numerous; 

 involucre cylindric, its bracts pink, oblong, ob- 

 tuse, imbricated in 4 or 5 series, the outer shorter; 

 flowers pink or purple, occasionally white. 



In moist soil, New Brunswick to Manitoba, Florida 

 and Texas. Called also Kidney-root, Queen of the 

 Meadow. Aug.-Sept. 

 Eupatorium purpureum falcatum (Michx.) Britton, 

 Mem. Torr. Club, 5: 312. 1894. 

 E. falcatum Michx. Fl. Bor. Am. 2: 99. 1803. 

 Eupatorium purpureum var. angustifolitim T. & 



G. F1.>N. A. 2: 82. 1841. 



Leaves narrower, linear, lanceolate, or linear- 

 oblong, 6"-i5" wide. With the type. 



Gravel-root. 



