Genus 65.] 



THISTLE FAMILY. 



431 



5. Verbesina alternifdlia (L,.) Britton. 

 Actinomeris. (Fig. 3924.) 



Coreopsis allernifolia L- Sp. PI. 909. 1753. 

 Actinomeris squarrosa Nutt. Gen. 2: 181. 1818. 

 Actinomeris allernifolia DC. Prodr. 5: 575. 1836. 

 Verbesina allernifolia Britton; Kearney, Bull. Torr. 



Club, 20: 485. 1893. 



Perennial; stem puberulent or glabrous-, narrowly 

 winged, or wingless, simple, or branched near the 

 summit, leafy, 4-9 high. Leaves oblong-lanceo- 

 late or lanceolate, acuminate, serrate, serrulate or 

 entire, rough or roughish on both sides, gradually 

 narrowed to the sessile base, or the lower short- 

 petioled, 4 / -i2 / long, }i / -2 , / 4 / wide, sessile, short- 

 petioled, alternate, or the lower opposite and slen- 

 der-petioled; heads numerous, i / -2 / broad, corym- 

 bose-paniculate; rays 2-10, yellow; involucre of few 

 lanceolate, at length deflexed bracts; disk globose, 

 yellow; achenes broadly winged or nearly wingless, 

 sparingly pubescent; pappus 2 divergent awns. 



In rich soil, New Jersey to western New York, Iowa, 

 Florida and Louisiana. Aug.-Sept. 



66. COREOPSIS L,. Sp. PL 907. 1753. 

 Annual or perennial, mostly erect herbs, with opposite leaves, or the upper alternate, 

 and large long-peduncled heads of both tubular and radiate flowers, the rays yellow, or brown 

 at the base, or brown throughout, or pink. Involucre usually hemispheric, its bracts in 2 

 distinct series, all united at the base, those of the outer series commonly narrower and shorter 

 than the inner. Receptacle flat or slightly convex, chaffy, the chaff flat or concave. Ray- 

 flowers neutral. Disk- flowers perfect, fertile, their corollas with slender tube and broader 

 5-toothed limb. Anthers mostly entire at the base. Style-tips truncate or subulate. 

 Achenes flat, orbicular to oblong, winged or wingless. Pappus of 2 short teeth, or a mere 

 coroniform border, or none. [Greek, bug- like, referring to the achenes.] 



About 50 species, natives of America, South Africa and Australasia, known as Tickseed. In 

 addition to the following, some 10 others occur in the southern and western United States. 

 5fr Rays pink, or occasionally white; leaves linear, entire, i. C. rosea. 

 vf -a- Rays yellow with a brown base, or brown; lower leaves pinnately divided. 

 Lobes of the lower leaves oblong or oval; achenes winged. 2. C. cardaminefolia. 



Leaf-lobes all linear-lanceolate; achenes wingless. 3. C. iinctoria. 



X- -5f & Rays yellow throughout. 



1 . Leaves sessile, rigid, palmately 3-lobed below the middle. 4. C. palmata. 



2. Leaves sessile, some or all 3-divided to the base, appearing verticillate. 

 Leaf-segments oblong or lanceolate, entire. 5. C. major. 

 Leaf-segments 1-2-pinnately parted. 



Divisions of the segments linear-lanceolate. 6. C. delphinifolia. 



Divisions of the segments very narrowly linear. 7. C. verticillata. 



3. Stem-leaves sessile or petioled, entire, or the lower 3-5-lobed; achenes often with a callus at 



each end on the inner side. 

 Glabrous or nearly so; stem leaves lanceolate; achenes winged. 

 Plants hirsute, hispid or pubescent at least below. 



Plant leafy, 2-4 high; stem leaves oblong, acutish. 

 Leaves few; plants i-2 high: stem leaves mostly obtuse. 

 Achenes broadly winged; basal leaves oblong. 

 Achenes narrowly winged; basal leaves nearly orbicular. 



4. Leaves, or most of them, 1-2-parted into linear segments; rays lobed. 



5. Leaves petioled, all but the upper pinnately 3-5-divided, rays entire. 



8. C. lanceolata. 

 9. C. pubescens. 



10. C. crassifolia. 



11. C. auriculata. 



12. C. grandi flora. 



13. C. tripteris. 



i. Coreopsis rosea Nutt. Small Rose or 

 Pink Tickseed. (Fig. 3925.) 



Coreopsis rosea Nutt. Gen. 2: 179. 1818. 



Perennial by slender rootstocks; stems at length 

 much branched, slender, strict, glabrous, 6 / -24 / high. 

 Leaves opposite, linear, glabrous, entire, obscurely 

 1- nerved, i / -2% / long, y t ' , -\' / wide, sessile, or the 

 lower petioled; heads slender-peduncled, several or 

 numerous, 6 // -i2 // broad; disk yellow; rays 4-8, pink 

 or rose-colored (occasionally white), oblong to obo- 

 vate, slightly 3-toothed or sometimes entire; inner 

 bracts of the hemispheric involucre ovate-oblong, 

 acutish or obtuse, glabrous, much longer than the 

 lanceolate outer ones; style-tips yellow, truncate; 

 achenes oblong or linear-oblong, thin, not winged, 

 nearly straight, slightly ribbed on the inner face; 

 pappus a very short truncate crown. 



In open swamps, eastern Massachusetts to Georgia, 

 near the coast. July-Aug. 



