314 LXXV. COMPOSITE. Eupatorium. 



series ; receptacle naked ; corolla 5-toothed, enlarged at the throat ; 

 branches of the style much exserted ; achenia 5-angled, crowned with 

 a cup-shaped pappus of 5, obtuse, horny scales. — % Aquatic^ glabrous, 

 simple, with 1 — 3 terminal /leads. Lvs. veriicillate. Fls. purple. 



S. VERTiciLLATA. Cass. (Sparganophopus. Michx.) 



In shallow water, N. J. to Flor. Stem decumbent at base, 1 — 2f high. 

 Leaves in numerous whorls of about (!, linear-setaceous, entire, 1' in length. 

 Head commonly solitary, at top of the stem. Jl. Sept. 



4. EUPATORIUM. 



Dedicated to Eiipater, king of Puiitus.whi) first used the plant in medirine. 



Flowers all tubular ; involucre imbricate, oblong ; style much ex- 

 serted, deeply cleft ; anthers included ; receptacle naked, flat ; pappus 

 simple, scabrous ; achenia 5-angled. — "^1- Herbs, with opposite or verti- 

 cillate leaves. Hds. corymbose. Fls. of the cyanic series, thai is, white., 

 blue, red, <^c.. never yellow. 



* Leaves verticillate. Flmoers purple.-f 



1. E. FisTOLOsuM. Barratt. (E. purpureum. Willd. in part. E. macn- 

 latum. Linn, in part. E. purpureum. y. angudifolium. T. <f- G.) Trwrw- 

 pet-u-eed. — St. fistulous, glabrous, glaucous-ptirple, striate or fluted; Iv;. 



in about 12 whorls of 6s, largest in the middle of the stem, j-ather finely glan- 

 dular-.serrate ; midvein and veinleis livid purple ; corymb globose, wiUi whorled 

 peduncles. — Thickets, U. S. and Can., very abundant in the Western States! 

 Height 6 — lOf, hollow its whole length. Leaves, including the 1' petiole, 8' by 

 2'. Corymb often If diam. Flowers purple. The glaucous hue and suifused 

 redness of this majestic plant are most conspicuous in flowering-time. It does 

 not appear to pos.sess the acrid properties of E. maculatum. July — Sept. 



2. E. MACULATUM. (E. purpureum, /?. Darl.) Spotted Enpatorium. 



St. solid, striate, hispid or pubescent, greenish and purple, with numerous 

 glands and purple lines; i\\e glands on the stem and leaves give out an acrid 

 efiluvium in flowering-time ; lvs. tripli-veined, 3 — 5 in a whorl. — Low grounds, 

 U. S. and Can. Stem 4 — 6f high. Leaves petiolate, 6 — 7' by 3 — 4', strongly 

 serrate. Flowers purple. July — Sept. 



ff. u7-tic(cfoUinn. 'Ba.Tra.tt. Height 4 — 5f; st. solid, slender; lvs. thin, much 

 longer than the usual lorm of E. maculatum. 



3. E. PURPUREUM. hinn. not of DC. Willd. nor Ph. (E. verticillatum. T-F/ZZ*^.) 

 SI. solid, glabrous, green, sometimes purplish, with a purple band at the 



joints about 1' broad; tvs. feather-veined, in whorlsof 3, 4 and 5, smooth above, 

 with a soil pubescence beneath along the midvein and veinlets, coarsely serrate. 

 — Dry woods or meadows, common, U. S. and Can. Stem 6f high. Leaves 

 thin and soft, 9 — 12' (including the 1' petiole) by 3 — 4'. Corymb lax, pale pur- 

 ple, varying to whitish. Aug. Sept. 



/3. album. Barratt. (E. trilbliatum. Darl.) Ms. dull white ; lvs. 5 in a whorl, 

 large and distant. — It occurs also with 4 leaves in a whorl — a tall variety, 

 upper leaves subfalcate ; also with 3 leaves in a whorl — tall and slender, 



4. E. TERNiPOLiuM. Ell. (in part.) 



St. solid, somewhat hispid and glandular, greenish, with purple dots and 

 lines ; lvs. mostly 3 in a whorl, the upper and last whorls smooth and finely ser- 

 rate. 



0. vesiculosum. Barratt. St. ."Striate, purplish, solid, 2 — 3f high. — Abundant 

 in meadows and pastures. A handsome variety, with a prolusion of purple 

 flowers in a large, spreading corymb. The leaves present a vesicular appear- 

 ance in a remarkable degree on their upper surface. 



* * Leaves opposite. Heads 3 — b-flowered. 



5. E. HYssoPiFOLiuM. Narrow-leaved Eupatorium. 



Lvs. opposite (the upper ones alternate), often verticillate, linear-lanceo- 



t This section according to Dr. Barratt, See preface. 



