COMPOSITE, (composite family.) 259 



§ 3. Corolla of the ray and disk yellow or partly brown : brancluis of the style tipped 

 with a pointed or acute appendage. 



* Achenia nearly orbicular, broadly winged, incurved, furnished with a callous tubercle 



on the inside at the top and bottom, crowned with 2 small chaff-like denticidate 

 teeth : outer involucre about the length of the inner : rays large, coarsely 3-5- 

 toothed : leaves opposite or the uppermost alternate : heads on long naked pedun- 

 cles : root in our wild species perennial. 



2. C. auricul^ta, Linn. Pubescent or glabrous; stems l°-40 high, 

 branching, sometimes with runners ; leaves mostly petioled, the upper Along or oval- 

 lanceolate, entire ; the lower oval or roundish, some of them variously 3 - 5-lobed or 

 divided; scales of the outer involucre oblong-linear or lanceolate. — Rich woods 

 and banks, Virginia to Dlinois and southward. June- Sept. 



3. C. lanceolita, L. Smoothorhairy(l°- 2° high); stems short, tufted, 

 branched only at the base; leaves all entire (or the lower rarely with a pair of 

 small lateral lobes), lanceolate, sessile, the lowest oblanceolate or spatulate, tapering 

 into petioles; scales of the outer involucre ovate-lanceolate. — Rich or damp 

 soil, Michigan and Illinois to Virginia, and southward. July. Also cultivated 

 in gardens. — Heads showy : rays 1 ' long. 



C. tinct6kia, Nutt., a native of the plains beyond the Mississippi, with 

 the rays yellow above, and brown-purple towards the base, a common garden 

 biennial or annual, is becoming spontaneous in a few places. 



« * Achenia oblong, narrowly winged, minutely or obscurely 2-toothed at the summit : 

 scales of the outer involucre narrow, about the length of the inner, all more or less 

 united at the base : rays mostly entire and acute : leaves opposite, sessile, mostly 3- 

 divided, therefore appearing as ifwhorled: perennial (l°-3° high). 



4. C. Senifdlia, Michx. Leaves each divided into 3 sessile ovate-lanceolate 

 entire leaflets, therefore appearing like 6 in a wborl : plant minutely soft-pubes- 

 cent. — Sandy woods, Virginia and southward. July. 



Var. stell^ta, Torr. & Gr. Glabrous, and the leaves narrower. (C. stel- 

 lata, JViitt.) — Virginia, Kentucky, and southward. 



5. C. delphinif61ia, Lam. Glabrous or nearly so ; leaves divided into 

 3 sessile leaflets which are 2 - 5-parted, their dicisions lance-linear ( 1 " - 3" broad), 

 rather rigid; disk brownish. — Pine woods, Virginia and southward. July. 



6. C. Verticill^ta, L. Glabrous ; leaves divided into 3 sessile leaflets 

 which are 1 -2-pinnately parted into narroioly linear or filiform divisions. — Damp 

 soil, from Maryland and Michigan southward. Also cultivated in old gardens, 

 but not showy. July - Sept. 



7. C. palta^ta, Nutt Nearly smooth, simple ; leaves broadly wedge-shaped, 

 deeply 3-clefl, rigid ; the lobes broadly linear, entire, or the middle one 3-lobed. — 

 Prairies, Michigan to Wisconsin, and southwestward. July. 



* » » Achenia elliptical, narrowly winged, the narrowly notched summit of the wing 



minutely lacerate-toothed : scales of the outer involucre foliaceous, much smaller than 

 the inner, all united at the base : rays obtuse, entire : leaves opposite, petioled, 3 - 

 ^-divided : perennial. 



8. C. tripteris, L. (Tall Coheopsis.) Smooth; stem simple (4° - 9° 

 high), corymbed at the top; leaflets lanceolate, acute, entire. ( Chrysoste'mma, 



