406 ORDER LXVIII. — COMPOSITJE. 



ere viscid, with a short spine. Seeds glabrous; pappus plumose; re- 

 ceptacle brist]3\ — Purple. 2^. May — Aug. In cultivated lands, 4 — 

 fi feet. 



6. C. Lecon'tei, (T. &, G.) Stem slender, angled, terminated by a 

 single head. Leaves linear-lanceolate, with few spinous teeth, underside 

 woolly, upper glabrous, decurrent ; scales of the involucre appressed, 

 outer ones niucronate, inner ones longest and subulate-acuminate. — Pine 

 woods. 2 feet. 



7. H. horrid'ulum, (Mich.) Stem erect, simple, woolly. Leaves ses- 

 sile, pinnatifid, crowded near the base ; segaients lobed, dentate, spi- 

 nous, hairy on the upper surface, woolly beneath. Flowers solitary, 

 axillary and terminal, on short peduncles. Bracts numerous, spinous ; 

 spines arranged in pairs. Involucre ventricose ; scales lanceolate, slight- 

 ly hairy. Seeds shining; pappus plumose. — Purple. 1^. March — ■- 

 April. Poor soils. Common. 



8. C. repan'dum, (Mich.) Stem erect, sometimes branching, but 

 usually simple, woolly. Leaves oblong, narrow, aniplexicaul. repand, 

 sinuate, fringed with spines, woolly beneath ; branches 1-flowered, leafy. 

 Involucre with ovate-lanceolate scales, erect, spinous, slightly woolly ; 

 receptacle bristly ; pappus plumose. — Purple. 2^. June — July. 2 — 3 ft, 



Sub-order IL— LABIATIFLO'R^. 



Corolla mostly bilabiate, lower lip usually 3-Iobed, the upj^er 

 2-lobed or 2-toothed. 



Genus LXXXII.— CHAPTAL'IA. Vent. 

 (In honor of the French chemist Chaptal.) 



Involucre imbricate; florets of the ray in a double series, the 

 inner series pistillate, with long styles ; disk florets staminate, 

 bilabiate. Receptacle naked. Seed oblong, stiiate, glabrous. 

 Pappus pilose. 



1. C. TOMENTo'sA, (Vent.) Root tuberous ; scapes several from each 

 root, tomentose, 1-flowered. Leaves oblong-lanceolate, retrorsely den- 

 tate, white, tomentose beneath. Flowers solitary, nodding, leaves of 

 the calyx linear-lanceolate, tomentose; ray florets 16 — 20 in the outer 

 series. — White and purple. 2^. March — April. Damp pine-barrens. 

 12—18 inches. 



Sub-order 111.— LIGULIFLO'R^. 

 Flowers all ligulate and perfect, arranged in a radiate manner. 



Tribe VL— CICHORA'CE^E. 

 Plants with a milky juice. Leaves alternate. 



