354: ORDER LXVIII. COMPOSITES. 



Corolla tubular, 5-parted. Achenia 5-angled ; pappus coroni- 

 form, usually toothed. Herbaceous plants, with opposite leaves. 



1. C. maiut'ima, (T. & G.) Stem decumbent, branching, terete. Leaves 

 ovate, serrate, petiolate ; heads in dense corymbs, pedicellate. — Blue. 

 Florida. 



Genus V.— AGER'ATUM. L. 



(From privative a, without, and geras, old age ; retains its color.) 



Heads many-flowered, homogamous, sub-globose. Involucre 

 many-leaved, imbricate. Leaves linear, acuminate. Receptacle 

 naked. Corolla tubular, 5-parted ; pappus paleaceous, 5 scales. 

 Achenia 5-angled, tapering at the base. Herbaceous plants, 

 with opposite leaves. 



1. A. conyzoi'des, (L.) Stem branching. Leaves varying from ovate 

 to cordate, on long petioles; pappus terminated by arms as long as 

 the corolla. — Blue or white. @. Low country of Geo. 



Genus VI.— SPARGANOPH'ORUS. Mich. (Sclerolepis, Cass.) 

 (From sparganon, a fillet, m&phero, I bear; the seed is crowned.) 



Involucre imbricate, sub-globose, pubescent, with the leaves 

 recurved at the summit. Ray florets wanting, those of the disk 

 perfect. Receptacle naked. Seed glabrous, pentangular. Pap- 

 pus membranaceous, 5 -cleft. 



1. S. verticilla'tus, (Mich.) Stem pubescent, simple. Leaves linear, 

 glabrous, verticillate, generally 6 in a whorl. Floioers generally termi- 

 nal and solitary. Involucre with lauceolate, colored leaves. — Purple. 

 2f . July — Aug. Pine-barrens. Mid. Car. and Geo. 10 — 16 inches. 



Genus VII.— CARPHEPH'ORUS. Cass. {Liatris.) 

 (From karplie, chaff, and phero, I bear, in allusion to its chaffy receptacle.) 



Heads many-flowered ; scales of the involucre in 3 series, 

 imbricate. Receptacle chaffy. Corolla tubular, 5-cleft. Stig- 

 ma, clavate. Achenia nearly terete, 10-ribbed; pappus one or 

 several series of unequal bristles. Flowers purple. Herbaceous 

 plants, with simple stem, corymbose flowers, and entire leaves. 

 A genus made up of species formerly belonging to Liatris. 



1. C. fseu'do-lia'tris, (Cass.) Stem virgate, tomentose. Leaves sub- 

 ulate, rigid, sessile, numerous, appressed ; heads few ; pedicels leafy 

 beneath the flowers. — Purple. 2£. Alabama. 18 — 24 inches. 



2. C. tomento'sus, (T. & G.) (Liatris Walteri, Ell.) Stem simple, gla- 

 brous at the base, hairy near the summit. Radical leaves lanceolate, 

 attenuate at the base, glabrous ; cauline ones smaller, diminishing in 

 size toward the summit, sessile, hairy. Flowers in corymbs ; involucre 

 with many florets; scales colored, tomentose. Seeds hairy; pappus col- 

 ored ; chaff linear. — Purple. If. Sept. — Oct. Southern Geo. 



3. C. bellijdifo'lius, (T. &, G.) Stems several from the same root, 

 paniculately branched, low, nearly glabroua Radical leaves spatulate, 



