232 COMPOSITE, (composite family.) 



long-lanccolatc, atutc, entire or serrulate, obscurely 3-ribbcd, nearly sessile 

 scales of the involucre ovate, acute, appresscd with spreading tips; rays 6-8. 

 — North Carolina, Curtis. — Stem 4° - 5° high. Heads twice as largo as those 

 of No. 18. 



21. H. longifolius, Pursh. Very smooth throughout; stem slender, 

 branching: leaves mostly opposite, linear-lanceolate, sessile, entire ; the lowest 

 tapering into slender petioles and sparingly serrate ; heads few, scales of the 

 involucre ovate-lanceolate, as long as the disk ; rays about 10. — Damp rich soil 

 in the Western districts of Georgia, Elliott. — Stem 3° -4° high. Leaves 6' - 

 8' long. Rays small. — Resembles an aquutie Coreopsis. 



11. ANXucs, the common Sitxflower, and H. tuberosus, the Jerusalem 

 Artichoke, arc commonly cultivated species. 



48. HELIANTHELLA, Torr. & Gray. 



Adicnia 4-angled, compressed, sliglitly winged, crowned with a ciliate border, 

 or the angles prolonged into persistent, often lacerated, chaffy scales ; othcnvise 

 like Ilclianthus. — Slender perennial herbs, with narrow leaves, and showy 

 heads of yellow flowers. 



1 . H. grandiflora, Toit. & Gray. Hirsute ; stem simple ; leaves alter- 

 nate or o])posite, lanceolate-linear, entire ; scales of the involucre lanceolate, 

 appresscd ; pappus of two obtuse lacerated scales. — East Florida. — Stem 3° - 

 4° high. Leaves l'-2' long. Rays nearly 2' long. 



2. H. tenuifolia, Torr. & Gray. Hirsute ; stem simple, or corj'mbose at 

 the summit; leaves narrow-linear, entire, the lower ones opposite or whorlcd ; 

 the upper alternate ; scales of the involucre lanceolate-subulate, spreading ; 

 pappus of 2 - 4 acute awns. — Dry sandy pine barrens. West riorida. June 

 and July. — Stem 10-2° high. Rays 1'- U' long. 



49. ACTINOMERIS, Nutt. 



Heads many-flowered ; the ray-flowers 4-14, neutral, or wanting. Scales of 

 the involucre in 1-3 rows, leafy. Receptacle convex or conical, chaffy; the 

 chaff embracing the outer edge of the laterally compressed obovato mostly 

 winged achenia. Pappus of two persistent awns (obsolete in No. 5). — Peren- 

 nial herbs, with ovate or lanceolate serrate often decuncnt leaves. Flowers yel- 

 low or white. 



* Stems tall, branching : }>a]if)us 2-awncd. 



1- A. squarrosa, Nutt. Stem pubescent, winged above ; leaves alternate 

 or opposite, rough, ovate-lanceolate, acuminate at each end ; heads corymbose; 

 scales of the involucre in 2 rows, linear-spatulate, spi"cading ; achenia broadly 

 obovate, winged ; awns of the pappus rigid, spreading ; rays 4-12, yellow. — 

 River-hanks, Florida to N<irth Carolina. Sept. — Stem 4° - 8° high. Lowest 

 leaves 1° long. 



2. A. alba, Torr. <f^ (iniy. Stem smooth, or pubescent and often slightly 

 winged above; leaves alternate, rough, lanceolate; heads loosely coryuilxjse ; 



