OKPEK 70. COMPOSITE. 173 



1 S. lacinla.tum L. Polar Plant. Very rough, with white, hispid hairs ; leaves (180 



pinnately parted, petiolate, segments sinuate-lobed or entire; heads spicatc, distant 

 scales ovate, appendaged and squarrous at apex. Prairies, W. 5 lOf. July Sept. 



2 S. terebtiithlnaceum L. Pi-airie liurdock. St. glabrous; Ivs. ovate to oblong, 



cordate, tooth-serrate, obtuse (1 2f ) ; hds. panicled ; scales round-oval ; rays about 20 ; 

 fr. n inged. Prairies, W. and S. 4 8f. Exudes much resin. Hds. V broad, rays 1' long. 

 /3. pinnaitftdwm, Lvs. more or less deeply lobed or pinnatifld. Prairies. 



8 S. compositiim MX. Glabrous throughout : slender, glaucous ; Ivs. cordate, vari- 

 ously sinuate-pinnatifid with lobed segments ; hds. corymbed ; fr. roundish-obcordatc ; 

 lays about 10. Barrens, S. 3 6f. July, Aug. Varies with leaves only toothed. HiUa. 



i S. trifoliatuiu L. St. glabrous, terete or 6-angled; Ivs. lanceolate, acute, short-peti- 

 oled. in 3's or 4's, upper opp. ; cyme loose ; fr. oval, 2-toothed. Dry, (). to Fla. 4 (if. 



& S. liitegrifollum MX. Scabrous; st. 4-angled ; Ivs. opp., sessile, ovate-lanceolate, 

 entire, cordate ; corymb close ; fr. broad-winged, 2-toothed. Prairies, W. and S. 2 3f. 

 /3. in-niii nut. Stem 6-angled ; Ivs. verticillate in 3's. With tiie common form. 



6 S. Kcaberriiimm Ell. Rough-hispid ; Ivs. rigid, oval, some pointed, serrate, petio- 



late. scales ciliate-serruiate ; fr. roundish, broad-winged, deeply notched at apex. W. 

 Ga. to La. 3 4f. Corymbed. Rays 20, spreading 2'. Fruit 6". Aug. Sept. 



7 S. laevlgtktum Ell. Glabrous ; Ivs. lance-oblong, acute, serrate, petiolate : scales 



ciliate ; fruit, large, oval, narrowly winged, emarginate. W. Ga. Ala. 2 3f. Heads 

 small, loosely corymbed. Rays spreading, If. Fruit 4". Aug. Sept. 



8 S. Asteriscus L. Hispid or hairy ; Ivs. lanceolate, crenate-serrate, petiolate : scale* 



leafy ; fruit broad-obovate, 2-toothcd. Dry soils, Va. to Fla. 2 4f. June Au;;. 

 /3. pumiluiH. Downy, low; leaves elliptical ; heads small; fruit truncate. 



9 S. perfollatum L. Cup-plant. Stem square; leaves large, thin, ovate, forming a 



cup with their connate bases ; heads on long peduncles ; fruit broad-obovate, winged, 

 notched. By streams. W. and S. 4 7f. Heads large. July, Aug. 



42. BERLANDIERA, DO. Ilay-tts. 5 , fertile, in one series ; disk 9 

 but sterile. Scjiles in three series, leafy, stibequal. Recep. chaffy. Pales 

 obtuse. Gyp. all marginal, in one row, obcompressed, wingless, obovate, 

 adherent to the inner scales. Pap. minute. If Velvety -canescent, with alter 

 nate, cordate, petiolate leaves and yellow rays. 



1 D. tonieiitosa T. <fc G. Caulescent, simple, white-tomentous ; Ivs. oblong, obtuse, 



crenate ; heads in small, dense corymbs. Barrens, S. 1 2f. April Aug. 



2 B. sufoacaiilis N. Acanlescent, at length some caulescent, roughish canescent ; 



Ivs. sintiate-pinnatifid ; scapes tall, bearing a single head. Ga. Fla. May, June. 



43. MADIA, Molina. Invol. scales as many as the rays, complicate 

 and embracing the compressed cypselae. Recep. chaffy at its border. Rays 

 5 \~>, 9; didk-fls. $, but often sterile. Pap. 0. Hairy and glandular. 



HI. KLEGANS. Lvs. lance-linear, sessile ; heads corymbed ; rays linear-cuucate, 3-toothed 

 nt apex, yellow, with a purple base. From California, very showy. (Madaria, DC.) 



44. SPHENOGYNE, Br. Invol. imbricate. Sc. with broad scarious 

 lips. Recep. chaffy, pales embracing the flowers. Hays neutre ; disk-lls. 



9. Gyp. hairy. Pap. of obtuse, contorted, chaff-scales. S. Afr. Lvs. alternate. 

 8. SPECIOSA. Leaves pinnatifld, with oblong cut segments ; rays linear-oblong, spread 

 ing 2', yellow, disk dark purple. (T) If. Blooms profusely from July to Oct. 



45. PARTHENIUM, L. Rays 5, very short, fertile ; disk-fls. 00, tu- 

 bular, sterile. Invol. hemispherical. Sc. in two series, outer ovate, iniict 



