176 ORDER 70. COMPOSITE. 



unarmed pales or chaff. Gyp. 4-angled. Pap. a lacerate or toothed mar- 

 gin, or 0. U Leaves alternate. Heads large. Rays yellow. 



Rays large, drooping. a Leaves divided. Disk ovoid or rounded Nos. 1, 9 



a Leave? undivided. Disk columnar Nos. 3, 4 



Rays spreading. Disk dark purple, conical or rounded.. .(&) 



b Leaves deeply lobed or parted, the upper undivided Nos. 5, 6 



b Leaves undivided. c Pales of the disk whitish downy Nos. 7, 8 



c Pales dark purple as well as the flowers Nos. 9 12 



1 IK* laciniata L. Glabrous : lower lea% js pinnate, segments 3-lobed, upper leaves 



ovate ; disk ovoid, yellowish, pales truncate. Swamps. 3 5f. Rays near 2'. Aug. 



2 R. lieterophylla T. & G. Downy; Ivs. coarsely toothed, 3-5-lobed or parted, the 



lowest often round-cordate, highest ovate ; disk globous ; pales acute. Fla. 4f. Aug. 



3 R. maxima N. Glabrous ; leaves thin, ample, oval to oblong, subentire, the upper 



clasping ; head solitary, on a long ped. ; rays 2'. Wet barrens, Fla. to La. 7f. Aug. 



4 R. nitida N. Glabrous and shining ; leaves thick, lanceolate, acute, 3-5-vcined ; 



heads few or solitary ; disk brown ; rays 912, near 2'. Swamps, S. 4f. July. 



5 R. subtomentosa Ph. Tomentous-downy, corymbous ; leaves serrate, the lower 



3-parted or lobed, upper ovate; disk globular; pales bearded, obtuse ; rays 1015, 

 orange-yellow, V. Prairies, W. and S-W. 3 5f. July, Aug. 



6 R. triloba L. Hairy, paniculately branched ; Ivs. coarsely serrate, 3-lobed to ovate- 



lanceolate, the lowest cut-pinnate or undivided ; hds. rather small, disk conical, dark 

 purple ; pales smooth, awned. Fields. M., W. 3 4f. Aug. Sept. 



7 R. mollis Ell. Soft-woolly all over; Ivs. oblong, sessile or clasping ; sc. reflexed ; 



disk dark purp.,with canescent pales ; rays 15-20, 1'. W. Ga. 2-3f. Lvs. small. Aug.-Oct. 



8 R. Hellopsidls T. & G. Slightly downy ; Ivs. ovate or oval, 5-veined, petiolate ; 



BC. obtuse, squarrous, rays 10 12; pales canescent. W. Ga. and Ala. l-2f. Aug. Sept. 



9 R. lilrta L. Very rough-hairy ; ped. leafless ; Ivs. ovate-spatulate, 3-veined, petio- 



late, mostly entire, upper ones sessile, lance-ovate ; scales in 3 rows ; rays oval, 12 15 ; 

 disk rounded, dark brown ; pales bearded. Fields. 2f. Showy. July Sept. 



10 R. fulglda Ait. Rough-hirsute; branches leafless above; Ivs. ovate to lance-ub- 

 long, remotely dentate, lower petiolate ; scales oblong, spreading as long as the 1214 

 orange rays; pales glabrous, lin.-oblong, obtuse. Mts. Pa. toO., and S. l-3f. July-Oct. 



11 R. speciosaWend. Hairy and downy ; branches slender, leafless above ; Ivs. strong- 

 ly dentate, acuminate, ovate to lanceolate, 5-3-veined, lower long-petiolate ; sc. much 

 shorter than the 18 rays ; pales smooth, acute. 111. to Va. 2 4f. Aug. Oct. 



12 R. AMPLEXIFOI.IA. (T) Branching, glabrous; Ivs. cordate-clasping; rays spotted at 

 base, brilliant. La. (Dracopsis.) 



55. LEPACHYS, Raf. In vol. in one series of linear scales. Ray-fls. 

 few, neutral ; disk . Recep. columnar, chaffy. Chaff obtuse, and bearded 

 at apex. Pap. 0. Fertile achenia compressed, 1-2-winged. if Lvs. alter- 

 nate, pinnately divided. Hds. with long, drooping, yellow rays. June-Sept. 



1 \A. pi ii ii a. t a T. & G. Rough ; Ivs. all pinnate, divisions 5 7, 2-parted or entire ; 



rays light yellow, twice longer than the ovoid yellowish disk. W. N-Y., W. and S. 2-4f. 



2 1. columnaris. Rough, branching; root Ivs. undivided, oblauceolate ; stem Ivs. 



pinnatifid ; disk nearly 2' long, longer than the 5 8 broad rays, which, in Variety pul- 

 ckerrima, are crimson, tipped with yellow. Montana. 2f. 



56. HELIANTHUS, L. SUN-FLOWER. Ray-fla. neutral ; disk $. Sc. 

 of the invol. imbricated in several series. Recep. flat or convex, the chaff 

 persistent, embracing the fruit. Pap. of 2 or 4 chaffy awns, mostly decidu- 

 ous. Fruit compressed or 4-angled. U Rough. Lvs. opposite, the up- 



