ORDER 70. COMPOSITE. 173 



1 S. la< l iii.itu til L. Polar Plant. Very rough, with white, hispid hairs* ; leaves (180 



pinnately parted, pctiolate, segments sinuate-lobed or entire; heads spicate, distant; 

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



2 S. terebintlilnaceum L. Prairie Burdock. St. glabrous; Ivs. ovate to oblong, 



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

 fr. winged. Prairies, W. and S. 4 Sf. Exudes much resin. Hds. V broad, rays 1' long. 

 )3. pint:ftHtl(!iit. Lvs. more or less deeply lobed or pinnatifid. Prairies. 



3 S. compositum MX. Glabrous throughout ; slender, glaucous ; Ivs. cordate, vari- 



ously sinuate-pinnatifid with lobed segments ; hds. corymbcd ; fr. roundish-obcordate ; 

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



4 S. trifoliutum L. St. glabrous, terete or G-angled; Ivs. lanceolate, acute, short-peti- 



oled, in 3's or4's, upper opp. ; cyme loose; fr. oval, 2-toothed. Dry, O. to Fla. 4 6f. 



5 S. integrifolium MX. Scabrous; st. 4-anglcd ; Ivs. opp., sessile, ovate-lanceolate, 



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



/3. trrnatutn. Stem 6-angled ; Ivs. verticillate in 3's. With the common form. 

 G S. ttcaberrimum 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. Hays 20, spreading 2'. Fruit G". Aug. Sept. 



7 S. lie viiiatum 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 ; scales 



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

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



9 S. pcrf oliiitum 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, DC. Ray-fls. ? , fertile, in one series ; disk $ 

 but sterile. Scales in three series, leafy, subequal. Recep. chaffy. Pales 

 obtuse. Cyp. all marginal, in one row, obcompressecl, wingless, obovate, 

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

 nate, cordate, petiolate leaves and yellow rays. 



1 II. tomeiitosa T. & G. Caulescent, simple, white-tomentous ; Ivs. oblong, obtuse, 



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



2 B. subacaulis N. Acaulescent, at length some caulescent, roughish canescent ; 



Ivs. sinuate-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 cypselaB. Recep. chaffy at its border. Rays 

 5 15, ? ; disk-fls. $ , but often sterile. Pap. 0. Hairy and glandular. 



M. ELEGANS. Lvs. lance-linear, sessile ; heads corymbed ; rays linear-cuneate, 3-toothed 

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



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

 tips. Recep. chaffy, pales embracing the flowers. Rays neutre ; disk-fls. 

 5. Cyp. hairy. Pap. of obtuse, contorted, chaff-scales. S.Afr. Lvs. alternate. 



S. SPECiosA. Leaves pinnatifid, 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, inner 



