254 COMPOSITES. (COMPOSITE FAMILY.) 



sparingly serrate, rough above, paler and tomeutose beneath, on short peti- 

 oles ; heads numerous ; scales of the involucre ovatej-lauceolate, appressed ; 

 rays 5-8. Dry woods, Florida, and northward. Sept. Stem 3 - 5 high ; 

 the branches forking. Leaves 3'- 10' long. 



20. H. Schweinitzii, Torr. & Gray. Stem hispid, branching above; 

 leaves lanceolate, acuminate, sparingly serrate, nearly sessile, very rough 

 above, hoary -tomeutose beneath; the lower ones opposite, the upper alter 

 iiate and entire ; scales of the involucre lanceolate, acute, with spreading tips ; 

 rays about 8. Upper districts of North Carolina (Curtis). Stem 3 -5 

 high. Leaves 3' - 5' long. 



21. H. laevigatus, Torr. & Gray. Stem smooth and glaucous, the 

 branches forking ; leaves smooth on both sides, opposite, or the uppermost 

 alternate, oblong-lanceolate, acute, entire or 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. 19. 



22. H. longifolius, 1 ursh. 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. 



57. HELIANTHELLA, Torr. & Gray. 



Achenia 4-augled, 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 very 

 scabrous, alternate or opposite, lanceolate-linear, or linear, entire ; scales of 

 the involucre lanceolate, appressed ; pappus of two obtuse lacerated scales. 



- East Florida. Oct. Stem 3 -4 high. Leaves 1'- 2' long. Rays nearly 

 2' long. 



2. H. tenuifolia, Torr. & Gray. Hirsute ; stem simple, or corymbose at 

 the summit ; leaves narrow-linear, 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 

 _ j u iy. _ Stem 1- 2 high. Rays 1' - H' long. 



58. VERBESINA, L. 



Heads mostly many-flowered ; the rays pistillate, rarely wanting. Scales 

 of the involucre imbricated in 2 or more rows. Receptacle convex or conical. 

 Achenia erect, compressed, winged or wingless, 2-awued. Perennial herbs, 

 often with winged stems, and mostly yellow flowers. 



* Heads small : rai/s 1 - 5. 



1. V. OCCidentalis, Walt. Stem 4-winged, branching; leaves oppo- 

 site, ovate or ovate-lanceolate, acuminate, sharply serrate, 3-rihbed; corymbs 



