432 



COMPOSITAE. 



[Vol.. III. 



2. Coreopsis cardaminefolia (DC.) 



T. & G. Cress-leaved Tickseed. 



(Fig. 3926.) 



Calltopsts cardaminefolia DC. Prodr. 5: 56S. 1836. 

 Coreopsis cardaminefolia T. & G. Fl. N. A. 2; 346. 



1S42. 



Annual; stem glabrous, branched, l°-2>^° Wgb- 

 Basal leaves petioled, 2'-^' long, 1-2-pinuatcly 

 parted into obloug or oval obtuse segments, the 

 petioles sometimes slightly ciliate; stem-leaves dis- 

 tant, sessile, or nearly so, pinnately parted into lin- 

 ear scgiiieuts, or the uppermost entire; heads 8"- 

 12" broad, slender-peduncled; involucre hemi- 

 spheric, its inner bracts brown, ovate or ovate- 

 lanceolate, obtuse or obtusisb, scarious-margiued, 

 much longer than the lanceolate obtusish outer 

 ones; rays 4-S, yellow with a brown base, ^-toothed; 

 achenes oval, i"-l/i" long, winged, smooth, or 

 slightly papillose; pappus of 2 minute awns, or none. 



In moist soil, Kansas to New Mexico. Louisiana and 

 northern Mexico. May-Oct. 



3. Coreopsis tinctoria Nutt. Garden 

 Tickseed. (Fig. 3927.) 



Coreopsis tinctoria Nutt. Journ. Acad. Phila. 2; 114. 

 1821. 



Annual; stem glabrous, branched, i°-3>^° high. 

 Leaves 1-2-pinnately divided into linear obtusish 

 mostly entire segments, or the uppermost linear 

 and entire, the lower petioled; heads slender-pe- 

 duncled, io"-i2" broad, or iu cultivation much 

 broader; involucre hemispheric, its inner bracts 

 brown, ovate or oblong, obtuse or acute, scarious- 

 margined, 3-5 times as long as the obtuse outer 

 ones; rays 5-io, cuneate, yellow with a brown 

 base or brown all over; style-tips truncate; achenes 

 linear or linear-oblong, about l" long, wingless; 

 pappus a mere border, or none. 



Id moist soil, Minnesota to the Northwest Terri- 

 tory, south to Nebraska, Louisiana and Arizona. Es- 

 caped from gardens to roadsides and waste places 

 eastward. May-Sept. 



Stiff 



4. Coreopsis palmata Nutt. 

 Tickseed. (Fig. 3928.) 



Coreopsis palmata '!:iu\.X.. Gen. 2: iSo. 1818. 



Perennial, stems rigid, glabrous, simple, or 

 little branched, very leafy, :°-3° high. Leaves 

 sessile, 2'-3' long, palmately 3-lobed at or be- 

 low- the middle, or the uppermost entire, thick, 

 rigid, the lobes linear-oblong, obtusish, entire, 

 or with 1-3 lateral lobes, their margins rough; 

 heads few or solitary, short-pedunclcd, i'-2' 

 broad; involucre hemispheric, its bracts some- 

 what united at the base, those of the outer series 

 narrower and nearly as long as the inner ones; 

 rays 6-10, bright yellow, oblong or obovate, 

 mostly 3-toothed; achenes oblong, narrowly 

 winged, slightly incurved; pappus of 2 short 

 tips, or none. 



On dry prairies and in thickets, Illinois to Lou- 

 isiana, west to Minnesota, Manitoba, Nebraska and 

 Texas. June-July. 



