242 COMPOSITE. (COMPOSITE FAMILY.) 



6. S. leBVlgatuni, Ell. Stem smooth ; leaves scabrous, thick, lanceolate- 

 obloug, acute at each eud, opposite, coarsely serrate, on short petioles ; the 

 upper nearly sessile ; heads small, loosely corymbose ; scales of the involucre 

 ovate, obtuse, spreading ; achenia oval-obovate, narrowly winged, emarginate 

 and slightly 2-toothed at the apex. Upper districts of Georgia and Ala- 

 bama. July - Sept. Stem 2 - 3 high. Lowest leaves 6' - 8' long. 



7. S. SCaberrimum, Ell. Stem mostly hispid ; leaves mostly opposite, 

 ovate, acute, serrate, very rough on both sides, on short petioles ; heads 

 corymbose; scales of the involucre ovate, ciliate ; acheuia nearly orbicular, 

 broadly winged, deeply notched at the apex. Florida to Tennessee, and 

 westward. August - Sept. Stem stout, 3 - 4 high, becoming smoothish. 

 Leaves 3' - 4' long. 



8. S. integrifolium, Michx. Stem 3 - 6 high, simple, smooth or 

 scabrous ; leaves oblong-ovate, the lower 3' - 5' long, short-petioled, often ser- 

 rate, the upper sessile, denticulate or entire; heads small, corymbose; scales 

 of the involucre round-ovate ; achenia 3" long, obovate, narrowly winged, 2- 

 toothed. Tennessee, and northward. July. 



9. S. brachiatum, Gatt. Stem 3 -5 high, smooth and glaucous; 

 leaves long-petioled, opposite, hastate-ovate or oblong-ovate, dentate, rough 

 above, the upper entire ; flowering branches spreading, few-flowered ; heads 

 ^' long, long-peduncled ; achenia broadly obovate, narrowly winged, emar- 

 ginate ; rays few. Cumberland Mountains, Tennessee. July. 



*- *- Stems square. 



1. S. perfoliatum, L. Stem and branches smooth or hairy; leaves 

 large, opposite, ovate or ovate-oblong, coarselv toothed, rough on both sides, 

 or pubescent or hairy beneath, their bases, or winged petioles, united ; the up- 

 permost commonly entire, simply serrate ; corymb trichotomous ; the central 

 heads long-peduncled ; scales of the involucre ovate, obtuse ; achenia broadly 

 obovato, emarginate. Banks of streams along the mountains of Georgia, 

 and northward. July -Sept. Stem 4 -6 high. Leaves 6' -12' long. 

 Heads large. 



38. BEEJLANDIERA, DC. 



Heads many-flowered. Ray flowers few, pistillate ; those of the disk tubu- 

 lar, 5-toothed, sterile. Scales of the involucre in three rows, the innermost 

 largest, membranaceons, adherent to the fertile achenia. Receptacle chaffy; 

 the chaff dilated upward, obtuse, hooded, partly embracing the sterile achenia ; 

 the inner ones gradually narrower. Fertile achenia in a single row, obovate, 

 flattened, wingless, pubescent on the inner face, the apex entire. Perennial 

 downy or hoary herbs, with alternate leaves, solitary or corymbose heads, 

 and yellow rays. 



1. B. tomentosa, Nutt. Stem leafy, hoary-tomentose ; leaves oblong- 

 ovate, crenate, hoary beneath, closely pubescent above ; the lowest tapering 

 into a petiole ; the upper cordate, sessile : heads at length numerous, corvm- 

 bose-pauicled. T)ry pine barrens, Florida to North Carolina, and westward. 

 June - August. Stem 1- 3 high. Leaves 2' -3' 



