210 COMPOSITE. (COMPOSITE: FAMILY.) 



olate, acute, hairy. Open grassy pine barrens, Florida, and westward. 



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



2. C. tomentOSUS, Torr. & Gray. Stem simple, tomeiitose ; leaves 

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

 narrowed 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. Low piue barrens, 

 North and South Carolina. Sept. Stem 2 high. 



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

 more or less hairy ; the lowest cuueate-lauceolate, 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. Margins of swamps, Florida to North Carolina. Sept. 

 Stem 2 -4 high. 



4. G. 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 

 sandy soil, Georgia to North Carolina Sept. Stems several from the same 

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



8. LIATRIS, Schreb. BL-TTON SNAKEROOT. 



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

 of the involucre imbricated. Receptacle naked. Corolla 5-lobed. Achenia 

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

 plumose or bearded bristles. Perennial herbs, with tuberous roots and sim- 

 ple stems. Leaves alternate, entire. Heads in spikes or racemes. Flowers 

 purple, often varying into white, commonly dotted with resinous particles. 

 * Scales of the ini-ohicre iritli petal-like or leafy tips: pappus plumose. 



1. L. elegans, Willd. Heads very numerous in a cylindrical raceme, 

 4 _5-no\verod ; inner scales of the involucre petal-like, purple ; stem tomen- 

 tose ; leaves smooth, the lowest lanceolate. Dry pine barrens, Florida to 

 South Carolina, and westward. August. Stem 2 high. Heads showy. 



2. L. squarrosa, Willd. Heads few or numerous, large, many-flowered, 

 cylindrical ; scales of the involucre with leafy spreading tips ; stem pubescent ; 

 leaves smoothish or hairy, lone;, linear, rigid, 3 -5-ribbed. Dry sandy soil. 

 July - August. Stem 1-H high. Heads 1' long, sessile or terminating 

 short branchlets. Corolla lobes hairy. 



* * Scales oftliP involucre not appendaged. 

 H- Heads 3 Glowered : pappus conspicuously plumose. 



3. L. Boykinii, Torr. & Gray. Nearly smooth; stem slender; leaves 

 linear, dotted ; heads 3-4-flowered, rather closely spiked ; scales of the invo- 

 lucre smooth, lanceolate or linear, acuminate and spreading at the apex, as 

 long as the pappus. Near Columbus, Georgia. August - Sept. Stem 1- 

 2 high. Spike 6' - 1 0' long. 



4. L. tenuifolia, Nutt. Smooth ; stem tall and slender ; leaves narrow- 

 linear or filiform, the lowest long and crowded ; heads 5-flowered, in a long 



