COMPOSITE. (COMPOSITE FAMILY.) 217 



8. C. villosa, Nutt. Rough-hairy and somewhat hoary throughout ; stem 

 rigid, very leafy ; leaves lanceolate, acute, entire or sparingly serrate ; the upper 

 ones sessile, the lowest narrowed into a petiole ; heads large, in a simple corymb. 

 Dry soil, Alabama, and westward. Sept. Stem l-2 high. Leaves 1' 

 long, fringed near the base. 



9. C. deeumbens, n. sp. Stems decumbent, simple, silky -villous ; leaves 

 villous, lanceolate-oblong, obtuse, entire, sessile, leafy in the axils ; the lowest 

 spatulate-oblong, clustered ; heads large, in a loose corymbose panicle ; the 

 peduncles and involucre glandular-pubescent ; rays about 25, showy ; achenia 

 hairy, furrowed ; exterior pappus bristly. Sandy shores on St. Vincent's Island, 

 West Florida. Oct. and Nov. (2) Stems 2 - 4 long. Upper leaves '- 1' 

 long, the lowest 3' -4'. Heads largest of all. 



25. INTJLA, L. ELECAMPANE. 



Heads many-flowered. Rays pistillate. Scales of the involucre imbricated in 

 several rows. Receptacle flat or convex, naked. Anthers bicaudate at the base. 

 Pappus single, of capillary slightly scabrous bristles. Perennial herbs. Flow- 

 <ers yellow. 



1. I. Helenium, L. Stem stout ; leaves large, ovate, denticulate, tomen- 

 tose beneath ; the lowest ones petioled, the upper clasping ; heads very large, 

 somewhat corymbose ; outer scales of the involucre broadly ovate, leafy ; rays 

 numerous, narrow ; achenia 4-sided, smooth. Mountains of North Carolina. 

 Introduced. 



26. CONYZA, L. 



Heads many-flowered ; the exterior flowers pistillate, fertile, in several rows ; 

 the corolla filiform, 2 - 3-toothed ; a few of the central flowers staminate, with a 

 tubular, 5-toothed corolla. Scales of the involucre in several rows. Receptacle 

 punctate. Pappus a single row of capillary bristles. Branching herbs, with 

 toothed-lobed leaves, and heads of yellow flowers in corymbs or panicles. 



1. C. ambigua, DC. Rough-hairy; lower leaves oblong-lanceolate, lobed, 

 the upper entire, linear; heads panicled. (C. sinuata, Ell.) Around Charles- 

 ton. Introduced. April -July. Stem 2 high. 



27. BACCHARIS, L. 



Heads dioecious, many-flowered ; the flowers all tubular. Corolla of the sterile 

 flowers 5-cleft ; of the fertile ones filiform, nearly entire, without anthers ; style 

 cxserted. Scales of the oblong or hemispherical involucre imbricated in sev- 

 eral rows. Receptacle naked or somewhat chaffy. Achenia ribbed. Pappus 

 of the sterile flowers capillary, in a single row, as long as the involucre ; of the 

 fertile flowers in 1 - several rows, commonly much longer than the involucre. 

 Smooth and resinous shrubs. Leaves alternate. Flowers white. 



1. B. halimifolia, L. Branches angled; leaves obovate, or oblong-ob- 

 ovate, toothed above the middle, the uppermost lanceolate, entire ; heads pedun- 

 19 



