Genus 66.] 



THISTLE FAMILY. 



433 



5. Coreopsis major Walt. Wood, or 

 Greater Tickseed. (Fig. 3929.) 



Coreopsis major Walt. Fl. Car. 214. 1788. 

 Coreopsis senifolia Michx. Fl. Bor, Am. 2: 138. 180.3. 



Perennial; stem pubescent, branched above, 

 2-3 high. Leaves sessile, more or less pubes- 

 cent, or glabrous, divided to the base into 3, 

 lanceolate or oblong, acute entire "segments 

 2 / -4 / long, 4 // -i2 // wide, which appear as if in 

 verticils of 6; upper and lower leaves (rarely all 

 of them 1, undivided and entire; heads several 

 or numerous, slender-peduncled, i / -2 / broad; 

 bracts of the hemispheric involucre all united 

 at the base, the outer ones linear-oblong, ob- 

 tuse, equalling or shorter than the broader 

 inner ones, all pubescent; rays 6-10, yellow, 

 oblong, entire; disk yellow; achenes oblong to 

 elliptic, winged, ]i"-i" long; pappus of 2 short 

 deciduous teeth. 



In dry sandy woods, Virginia (according to Watson 

 and Coulter), North Carolina to Florida. July-Aug. 



Coreopsis major Oemleri (Ell.) Britton, Mem. Torr. Club, 4: 131. 

 Coreopsis OEmleri Ell. Bot. S. C. & Ga. 2: 435. 1824. 

 Coreopsis stellaia Nutt. Journ. Acad. Phila. 7: 76. 1834. 

 Coreopsis senifolia var. stellata T. & G. Fl. N. A. 2: 342. 1842. 



Plant glabrous throughout ; leaf -segments often narrower. Virginia and West Virginia to Georgia. 



6. Coreopsis delphinifolia Lam. 

 Larkspur Tickseed. (Fig. 3930.) 



Coreopsis delphinifolia Lam. Encycl. 2: 108. 1786 

 Perennial; stem glabrous, branched above, 

 rather slender, i-3 high. Leaves sessile, 1-2- 

 ternately parted into linear or linear-lanceolate 

 segments which are i / -2 / long, i // ~3 // wide; 

 heads several or numerous, i^ / -2 / broad; invo- 

 lucre hemispheric, its bracts glabrous, the outer 

 linear-oblong, obtuse, shorter than or equalling 

 the ovate-oblong inner ones; rays 6-10, yellow, 

 entire; disk brown; achenes oblong to oval, 

 narrowed at the base, narrowly winged; pappus 

 of 2 short teeth. 



In dry woods, Virginia (according to Torrey and 

 Gray), North Carolina to Georgia and Alabama. 

 Aug.-Sept. 



7. Coreopsis verticillata L. Whorled 



Tickseed. (Fig. 3931.) 

 Coreopsis verticillata L. Sp. PI. 907. 1753. 



Perennial; stem stiff, much branched, slender, 

 leafy, i-2 high. Leaves sessile, glabrous, 

 2-3-ternately dissected into linear-filiform entire 

 segments; heads numerous, i'-i^' broad; invo- 

 lucre hemispheric, or short-cylindric in fruit, 

 glabrous, its outer bracts linear, obtuse, com- 

 monly somewhat shorter and much narrower 

 than the ovate-oblong inner ones; rays 6-10, yel- 

 low, spatulate-oblong, obtuse; disk dull yellow; 

 achenes oblong, narrowly winged, 1" long; 

 pappus of 2 short teeth. 



In dry soil, western Ontario to northern Michi- 

 gan, SOuth to Maryland, North Carolina, Kentucky, 

 Nebraska and Arkansas. June-Sept. 



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