232 COMPOSITZ. (COMPOSITE FAMILY.) 
long-lanceolate, acute, entire oy serrulate, obscurely 3-ribbed, nearly sessile ; 
scales of the involucre ovate, acute, appressed with spreading tips; rays 6-8. 
— North Carolina, Curtis. — Stem 4°-5° high. Heads twice as large as those 
of No. 18. wa 
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 30-40 high. Leaves 6/- 
8’ long. Rays small.— Resembles an aquatic Coreopsis. 
H. ANNUUS, the common SUNFLOWER, and H. TUBEROSUS, the JERUSALEM 
ARTICHOKE, are commonly cultivated species. 
48. HELIANTHELLA, Tor. & Gray. 
Achenia 4-angled, compressed, slightly winged, crowned with a ciliate border, 
or the angles prolonged into persistent, often lacerated, chaffy scales ; otherwise 
like Helianthus. — Slender perennial herbs, with narrow leaves, and showy 
heads of yellow flowers. 
1. H. grandiflora, Torr. & Gray. Hirsute ; stem simple; leaves alter- 
nate or opposite, lanceolate-linear, entire; scales of the involucre lanceolate, 
appressed ; pappus of two obtuse lacerated scales.— East Florida. — Stem 3? - 
4? high. Leaves 1/-2/ long. Rays nearly 2! long. i 
2. H. tenuifolia, Torr. & Gray. Hirsute; stem simple, or corymbose at 
the summit; leaves narrow-lincar, entire, the lower ones opposite or whorled ; 
the upper alternate; scales of the involucre lanceolate-subulate, spreading ; 
pappus of 2-4 acute awns. — Dry sandy pine barrens. West Florida. June 
and July. — Stem 19 ~ 2° high. Rays 1’—14’ long. 
49. ACTINOMERIS, Nutt. 
Heads many-flowered ; the ray-flowers 4-14, neutral, or wanting. Scales of 
the involucre in 1-3 rows, léafy. Receptacle convex or conical, chaffy ; the 
chaff embracing the outer edge of the laterally compressed obovate 
winged achenia. Pappus of two persistent awns (obsolete in No. 5). — Peren- 
nial herbs, with ovate or lanceolate serrate often decurrent leaves. Flowers yel- 
low or white. 
* Stems tall, branching : pappus 2-awned. n 
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, spreading ; achenia broadly | 
obovate, winged ; awns of the pappus rigid, spreading ; rays 4 — 12, yellow-— 
Riverbanks, Florida to North Carolina. Sept.— Stem 49-89 high. Lowest 
leaves 1° long. ' i 5 
