COMPOSITES. (COMPOSITE FAMILY.) 259 



§ 3. Corolla of the ray and disk yellow or partly brown : branches 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 denticulate 

 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. auriculata, Linn. Pubescent or glabrous; stems l°-4° high, 

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

 I'uiciolate, entire; the lower aval or roundish, some of them variously 3-5-lobcd or 

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

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



3. C. lanceolata, L. Smooth or hairy (1° -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. tinctoria, 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 whorl : plant minutely soft-pubes- 

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



Var. stellata, Torr. & Gr. Glabrous, and the leaves narrower. ( C. stel- 

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



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

 3 sessile leaflets which are 2 -b-parted, their divisions lance-linear (l"-3" broad). 

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



6. C. Verticillata, L. Glabrous ; leaves divided into 3 sessile leaflets 

 which are 1 -2-pinnate/y parted into narrowly linear or filiform divisions. — Damp 

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

 but not showy. July- Sept. 



7. C. palmata, Nutt. Nearly smooth, simple ; haves 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, cdl united at the base : rays obtuse, entire : leaves opposite, petioled, 3 - 

 5-divided: perennial. 



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

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



