190 composiTjE. (composite family.) 



7. SCLEBOLEPIS, Cass. 



Heads many-flowered. Scales of the involucre linear, imbricated in two rows, 

 equal. Receptacle naked. Corolla 5-toothed. Achenia 5-angled. Scales of 

 the pappus 5, almost horny, oval. — A smooth aquatic perennial herb, with 

 whorled linear leaves, and 1-3 heads of purple flowers, terminating the stem or 

 peduncle-like branches. 



1. S. verticillata, Cass. ( Sparganophorus verticiUatus, ikT/cfe.) — Shal- 

 low ponds, Florida to Mississippi, and northward. July. — Stems ascending, 

 1° high. Leaves 5 - 6 in a whorl. Heads J' wide. 



8. CARPHEPHOKUS, Cass. (Liateis, £ff.) 



Heads many-flowered. Scales of the involucre imbricated in 3-5 rows, ovate 

 or lanceolate, appressed. Receptacle chaffy. Achenia 10-ribbed. Pappus of 

 numerous unequal bearded bristles. — Erect perennial herbs. Leaves alternate. 

 Heads corymbed. Flowers purple. 



1. C. Pseudp-Liatris, Cass. Pubescent and somewhat hoary; stem 

 simple, rigid ; leaves linear, appressed, the lowest crowded, elongated ; corymb 

 small, dense, mostly simple ; pedicels bractcd ; scales of the involucre lance- 

 olate, acute, hairy. — Open grassy pine barrens. West Florida. September. — 

 Stem 6' - 18' high. Heads rarely racemose. 



2. C. tomentosus, Torr. & Gray. Stem simple, tomentose; leaves 

 smooth or hairy, gland-pointed ; the lowest oblong or lanceolate, 3-ribbed, nar- 

 rowed into a long clasping petiole, the others numerous, small, oblong or oval, 

 sessile; corymb loose-flowered; scales of the involucre very tomentose, the outer 

 ones short, ovate, the inner oblong, acute. (L. Walteri, Ell) — Low pine bar- 

 rens. North and South Carolina. September. — Stem 2° high. 



3. C. eorymbosus, Torr. & Gray. Stem tall, hairy ; leaves smooth or 

 more or less hairy; the lowest cuneate-lanceolate, obtuse, 1- or obscurely 3- 

 ribbed ; the others numerous, small, oblong, sessile ; heads about 20, closely 

 corymbed ; scales of the involucre nearly smooth and equal, oval, very obtuse, 

 broadly margined. (L. tomentosa, Ell.) — Margins of swamps, Florida to 

 North Carolina. September. — Stem 2° - 4° high. 



4. C. bellidifolius, Torr. & Gray. Smooth ; leaves spatulate-lanceolate, 

 3-ribbed, obtuse ; heads few in a loose corymb ; scales of the involucre oblong, 

 obtuse, sparingly fringed on' the margins; pappus slightly plumose. — Dry 

 sand-hills, Wilmington, North Carolina. September. — Stems several from 

 the same root, 12'- 18' high. Heads sometimes panicled. 



9. IiIATBIS, Schreb. Button-Snakeeoot. 



Heads few- or many-flowered, the flowers all similar and perfect. Scales of 

 the involucre imbricated. Receptacle naked. Corolla 5-iobed. Achenia nearly 

 terete, narrowed at the base, about 10-ribbed. Pappus of numerous plumose or 

 bearded bristles. — Perennial herbs (rarely shrubby), with mostly tuberous roots 



