190 OHDKK 70. COMPOSITE. 



3 r. Pitcherl T. & G \\Tiite-tomenton? ; Ivs. pinnatifid, segm. linear, spinons, mnigint 



revolute : scale? spine-pointed ; flowers ochrolencous. y. Lake shores, W. June, July. 



4 C. undiilatum Spr. White-tomentous ; Ivs. lance-oblong, sinuate-pinnatifid, wavy, 



prickly ; scales scarcely prickly : flowers purple. @ Mich., and N. 1 2f. 



5 C. discolor Spr. Slender, much branched; Ivs. pinnatifid, segm. 2-1 obed. divari- 



cate, spinous; scales ovate, tipped with a spreading ?pine. @ N. 3 5f. July-t-. 



6 C. altisslmmii Spr. Tall, branching, villous, leafy to the top; Ivs. lance-oblong, 



often sinnate-dentate, or pinnatifid, spinescent ; scales lance-ovate, the outer witli n 

 spreading spine. Fields, M. and W. 3 8f. Purple. August. 



7 C. Vlrglnlanum MX. Slender, subsimple, naked above ; Ivs. lanceolate, margins 



revolute, spinescent, lobcd or dentate, white-downy beneath ; heads small (6") ; scale? 

 bristle-tipped. Woods, W. and 8. 3-4f. Purple. April Sept. 



8 C. horrid ilium MX. Cottony when young; leaves cnt-pinnatifid, spinous ; heads 



large, invested by a whorl of very spiny bracts ; scales sharp-pointed, (a) Uplands, 

 N. Eng. to Fte. Flowers purple or cream-color. 1 3f. April August. 



9 C. )> ii mi I inn Spr. Hairy; Ivs. fewabove, green, clasping, lance-oblong, pinnatifld, 



segm. lobed, spinons ; heads few, very large, subtended by 15 bracts; invol. round- 

 ovate, spinous. @ Pastures, waysides, N. Eng. to Pa., and W. : com. 1 2f, stout. 

 Flowers purple, fragrant. July, August. 



10 C. mutlcnm MX. Lvs. pinnatifid; heads on naked peduncles, bractless ; invol. 

 unarmed, with webbed and glutinous scales, (a) Damp. 3 7f. Hds. V. Aug., Sept. 



/3. g-labrum. Nearly glabrous ; Ivs. lance-lin., lobed ; scales with minute spines. 8. 



11C. repandnm MX. Lvs. crowded to top, at length green both sides, clasping, lin.- 



oblong, wavy, epinous-ciliate ; hds. 1 or 2 ; inner scales subulate. Barrens, S. 1 2f 



12 C. arv^nse Scop. Canada Thistle. Lvs. sinuate-pinnatifid, wavy, lance-oblong- 

 hds. panicled, small (5"), numerous ; scales with minute prickles, u Waysides, fields. 

 N. and W. A pernicious weed, hard to extirpate. 3f. Very prickly, except its heads. 



1 3 C. PtTLCHERRiMtm with yellow flowers, 3f high, is rarely planted in borders. 



1 4 C. IANTHIUM. A greenhouse shrub, covered with pale blue flowers. From Mexico. 



98. LAPP A, Tourn. BURDOCK. Heads discoid, homogamous. Invol 

 globous, the scales imbricated and hooked at the extremity. Recep. bristly 

 Pap. bristly, scabrous, caducous. (2) European herbs. Lvs. alternate, large 

 cordate, petiolate. Hds. panicled, pink-purple, very adhesive by the hooks 



1i. officlnalls Allioni. A coarse weed, in waste and cultivated grounds, E. and W. 3f 

 (L. major Gsert.) Varies with small hds. and Ivs. somewhat pinnatifid. (L. minor DC.) 



99. LAMPSANA, Tourn. NIPPLEWORT. Hds. radiant, 8-12-flwd. 

 Inrol. cylindrical, angular. Scales 8, erect, in one row, with 2 or 3 

 minute bractlets at base. Recep. naked. Gyp. glabrous. Pap. 0. Slender, 

 oriental herbs, with small, yellow heads, in paniculate corymbs. 



I,, communla L. Stem leafy; Ivs. ovate, petiolate, dentate ; ped. cylindrical ; invol. 

 angular in fruit. Waysides, Quebec, Boston, and W. Rare. 



100. APOGON, Ell. Heads radiant. Invol. scales ovate, acuminate, 

 about 8, in two rows. Recep. naked. Ach. glabrous, oval, longitudinally 

 12-3triate. Pappus 0. Herbs glabrous and glaucous, branched from 

 the base. Leaves alternate, lanceolate. Heads small, yellow. 



A. liumilis Ell. Woods, S. Car. to Fla. and La. 312'. Slender, smooth ; Ivu. vary- 

 ing to linear, entire or lyrately lobed. Heads 3" broad. March June. 



101. OICHORIUM, Tourn. CHICORY. Invol. double, the outer of S 



