190 ORDER 70. COMPOSITE. 



3 . Pitclieri T. & G. White-tomentous ; lv. pinnatifid, segm. linear, spinoup, margini 



revolutc ; scales spine-pointed ; flowers ochroleucons. u Lake shores, W. June, July. 



4 C. undulatism 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-lobed. divari- 



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



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



often sinuate-dentate, or pinnatifid, spinescent ; scales lance-ovate, the outer with a 

 spreading spine. Fields, M. and W. 3 Sf. Purple. August. 



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



revolutc, spinescent, lobed or dentate, white-downy beneath ; heads small (6") ; scales 

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



8 C. liorridulum MX. Cottony when young; leaves cut-pinnatifid, spinous ; heads 



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

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



9 C. pumilum Spr. Hairy; Ivs. few above, green, clasping, lance-oblong, pinnatifid, 



segrn. lobed, spinous : heads few, very large, subtended by 15 bracts ; invol. round- 

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

 Flowers purple, fragrant. July, August. 



IOC. muticmn MX. Lvs. pinnatifid; heads on naked peduncles, bractless; invol. 

 unarmed, with webbed and glutinous scales, (f) Damp. 3 7f. Hds. 1'. Aug., Sept. 

 |3. fflabrum. Nearly glabrous ; Ivs. lance-lin., lobed ; scales with minute spines. S. 



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

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



12 C. arvense Scop. Canada Thistle. Lvs. sinuate-pinnatifid, wavy, lance-oblong- 

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

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



1 3 C. ruLciiERRiMUM 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, liomogamous. InvoL 

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

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

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



L. officinalls Allioni. A coarse weed, in waste and cultirated grounds, E. and W. 3f. 

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



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

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

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

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



Li. communls 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 

 !2-striate. Pappus 0. Herbs glabrous and glaucous, branched from 

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



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

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



101. CICHORIUM, Tourn. CHICORY. Invol. double, the outer of 5 



