COMPOSITE. (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 chajf-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- 

 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. Eich 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. TINCT6RIA, 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 ^-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 (1 3 high). 



4. C. Senif61ia, 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. delphinifdlia, Lam. Glabrous or nearly so ; leaves divided into 

 3 sessile leaflets which are 2 -5-parfed, their divisions lance-linear (!" 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-pi nnately 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. palm at a, Nutt. Nearly smooth, simple ; leaves broadly wedge-shaped, 

 deeply 3-c/efl, 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 - 

 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, 



