COMPOSURE, (composite family.) 24.3 



7. C. lanceolata, Nutt. Stem terete ; leaves rather fleshy, lanceolate or 

 linear-lanceolate, entire, 3-nervecl, somewhat glaucous ; the lowest tapering into 

 a long petiole, the upper sessile. — Brackish marshes, Georgia, Florida, and west- 

 ward. Aug. and Sept, — Stem 3° - 5° high. Lowest leaves 1° or more long. 



74. SENECIO, L. Groundsel. Butter-weed. 



Heads many-flowered ; the flowers all tubular and perfect, or with pistillate 

 rays. Scales of the involucre in a single row, often bracted. Receptacle naked 

 or alveolate. Achcnia not beaked nor winged. Pappus of copious soft hairs. 

 — Herbs, with entire or pinnately divided leaves. Heads corymbose. Flowers 

 yellow. Pubescence mostly webby and deciduous. 



* Annual : heads radiate. 



1. S. lobatus, Pers. Smooth; stem furrowed, hollow ; leaves tender, ly- 

 rate-pinnatiKd, with rounded toothed lobes ; the earliest orbicular, long-petioled ; 

 rays about 12. — Low ground, Florida to Xorth Carolina, and westward. March 

 and April. — Stem l°-3° high. Lobing of the leaves variable. 



* * Perennial: heads radiate : lowest leaves petioled, undivided ; the others pinnatel j 

 lobed or ioothed ; the uppermost sessile. 



2. S. aureus, L. Smooth, or more or less woolly when young ; stem (2° 

 higli) slender ; radical leaves long-petioled, round-cordate, crenate; the others 

 lanceolate or oblong-lanceolate, pinnatifid ; rays 8-12; achenia smooth. — 

 Mountains of North Carolina. July. 



Var. fastigiatUS. Stem stout (2° -3° high), stoloniferous ; petioles of 

 the larger (2' wide) leaves, as also the involucre, densely woolly at the base. — 

 River-banks, Florida. 



Var. Balsaraitse. Radical leaves spatulate-lanceolate or obovate ; lower 

 part of the stem often densely woolly ; achenia hairy. — Dry open woods in the 

 upper districts. May and June. — A polymorphous species. 



3. S. tomentOSUS, Michx. Woolly and hoary throughout ; the leaves 

 becoming smoothish ; lowest leaves oblong, crenate, obtuse ; stem-leaves few, 

 scattered, lanceolate, acute, serrate or toothed ; rays 12-15; achenia hairy. — 

 Damp soil, Florida to North Carolina. April and May. — Stems mostly simple, 

 2° - 3° high. Heads rather large. 



4. S. EUiottii, Torr. & Gray. Smoothish ; leaves chiefly radical, thick, 

 obovate or roundish, crenate, on short winged petioles; those of the stem small, 

 l)innatitid ; heads crowded; rays 9-12; achenia smooth. (S. obovatus, ^//. 

 in part.) — Rocky places. West Florida to North Carolina. April and May. — 

 Stem 1° high. Radical leaves 2' -3' wide. 



* * * Perennial : heads radiate : leaves all hipinnately dissected. 



5. S. Millefolium, Torr. & Gray. Woolly when young, at length nearly 

 smooth ; stems tufted, corymbose above ; leaves lanceolate, with the divisions 

 linear and toothed, the lowest ones petioled ; heads crowded; rays 9- 12. — 

 Mountains of North Carolina, Buckley. June. — Stems l°-2° high. 



21* 



