446 ORDER 70. COMPOSITE. 



1 R. nitida Nutt. Glabrous, shining, subsimple, Ivs. thick, lanceolate, acute, the 

 lower subserru'.ato, petiolate, upper sessile or clasping; hds. few or solitary, with 

 long, drooping rays ; pappus coroniform, lacerate at summit. Ga., Fla., to La. A 

 handsome herb. 3 to 5t" high, in swampy thickets. Lvs. with prominent veins 

 and vein lets. lids, on long naked peduncles. Rays 9 to 12, nearly 2' long. 

 Disk dark purple, oblong-ovato or spicate iu fruit. Jn., JL 



2 R. laciniata L. Glabrous ; lowtr Ivs. pinnate, segments 3-lobed, upper ones 

 ovate ; pappus crenate. In tho edges of swamps and ditches, Can. and U. S. A 

 tall, sliowy plant, resembling Helianthus, from which, however, it is readily dis- 

 tinguished by its conical, at length ovate disk. St. round, branching, G to 8f 

 high. Lvs. alternate, ample, rough, upper ones generally ovate, the rest variously 

 divided, toothed or cut, petiolate. Pis. large, terminal. Rays 1 to 2' long, 

 oblanceolate, bright yellow, spreading or drooping. Aug. (R. Isevigata Ph.) 



3 R. subtomentoga Ph. St. branching, tomentous-pubescent ; Ivs. petiolate, 

 hispid-scabrous above, softly subtomentous beneath, serrate, the lower deeply 3- 

 lobed or 3-parted, upper undivided, ovate, acuminato ; hds. corymbous ; scales 

 numerous, spreading; rays 10 to 15, spreading; disk at length globous; pales 

 bearded, shorter than the corollas. Prairies, &c., Western and S. W. States. St. 3 

 to 5f high, angular, marked with brown lines. Lvs. 3 to 5' long, on petioles 1 

 to 24" long. Rays orange yellow, about 1' long. Jl., Aug. 



4 R. triloba L. Hirsute; branches paniclcd spreading; lower cauline Ivs. 

 mostly 3-lobed, coarsely serrate, acuminate ; upper ovate lanceolate somewhat 

 clasping, serrate or entire ; radical ones ovate or oval, obtuse, crenate-dentate or 

 incisely lobed, petiolato ; hds. rather small, disk dark purple; at length ovoid; 

 rays 8, broad-oval, rather longer than tho linear, reflexed scale?. Fields, Mid. 

 and W. States. A handsome species, 2 to 4f high, very branching. Lvs. 2 to 

 4' long, 3-veined. Rays deep yellow, 6 to 10" long, as wide. Chaff cuspi- 

 date-awned at tho summit. Aug., Sept. 



5 R. mollis Ell. Soft-woolly or tomentous all over; Ivs. oblong, sessile or clasp- 

 ing ; scales linear lanceolate, reflexed; rays 15 to 20, elongated; disk dark pur- 

 ple except the canescent pales. W. Ga. An interesting species, confined as yet 

 to a narrow limit. Plant whitened with down, 2 to 3f high. Lvs. small lids, 

 large ; rays an inch long. Pappus almost none. Aug. Oct. 



6 R. Heliopsidis Torr. & Gr. Slightly downy ; Ivs. ovate or oval. 5-veined, 

 mostly obtuse, petiolate; scales obtuse, squarrous; rays 10 to 12; disk conical, 

 dark purple except the downy canescent pales. Barrens, W. Ga. and Ala. Plant 



1 to 2f high. Lvs. 2 to 3' long, the lower on long petioles. Pappus scarcely any. 

 Aug., Sept. 



7 R. hirta L. Very hirsute or hispid ; st. simple or somewhat branched ; pcd. 

 naked ; Ivs. ovate-spalulate, 3-veined, petiolate, mostly entire, tho upper ones sessile, 

 ovate-lanceolate; invol. scales numerous, narrow, imbricated in 3-ro\vs; raya 

 spreading, oval ; pales bearded. A showy plant in dry soils, Can. W. to Fla., 

 rarely in N. Kng. Sts. subsimple or branching from tho base, each branch leat- 

 less towards the summit, and bearing a largo head with 12 to 15 bright yellow 

 rays. These are an inch long, and surround a broadly conical disk of dark browa 

 chaff and flowers, f Jl., Sept. 



8 R. fulgida Ait. St. hirsute with rigid hairs ; branches slender, naked above : 

 Ivs. strigous-pubescent, remotely dentate, radical petiolate, ovate, 5-veincd. caulino 

 lance-oblong, tapering to the sessile, subclasping base ; scales oblong, spreading, as 

 long as the spreading rays ; pales glabrous, linear -oblong, obtuse. Mountains, 

 Peun. to Ohio and Ga. St. 1 to 3f high. Rays 1 2 to 14, scarcely longer than 

 the leafy involucre, deep orange-yellow. Jl. Oct. f (R. chrysomcla MX. R. 

 spatulata Ph.) 



9 R. speciosa TVender. St. hispidly hirsute ; branches slender, elongated, naked 

 above ; Ivs. scabrous-pubescent, strongly dentate acuminate, radical ovate, 5-veined, 

 on long petioles, cauline ovate and lanceolate, 3-veined, upper sessiio; scales 

 lance-linear, mucli shorter than tho spreading rays ; palss linear-obhng, acute.- 

 Borders of woods, 111. (Jenney), Ohio to Penn. A large and very showy species, 



2 to 4f high. Lvs. rather thin, radical, 4 to 5' by 3 to 4', the teeth mucroaulatc ; 



