452 Obdee ?0.— COMPOSITE. 



pinnalely or bipinnately parted, segments filiform, linear, obtuse; rays acute or (in 

 cultivation) obtuse and 2 or 3- toothed ; ach. obovate, slightly 2-toothed. — If 

 Moist places, Md. and "Western States. Stem 1 — 3f high. Leaflets apparently 

 verticillate in 63. Heads with bright yellow rays, near 1' long. Outer scales 

 oblong-linear, obtuse, united at baso. June — Aug. 



11 C. palmata Nutt. Nearly smooth ; st. branched, angled and striate, very 

 leafy to the summit ; lvs. sessile, deeply 3-cleft (to below the middle), rigid, lobes 

 linear, acutish, entire or again cleft; rays obovate-oblong ; ach. liuear-elliptic, in- 

 curved. — Dry prairies, "W. States. Stem 1 — 2f high, sometimes much branched. 

 Leaves 1 — 2£' long, some of them undivided, lobes 2 — i" wide. Heads 1 or 

 several, with yellow rays. Outer scales linear oblong, obtuse. Jn., Jl. (Calliop- 

 ais, Spreng.) 



12 C. tripteris L. Glabrous ; sL simple, tall, corymbous at summit ; lvs. coriace- 

 ous, opposite, petiolate, 3 — 5-divided, divisions linear-lanceolate, entire, acute; 

 hds. small, on short peduncles, rays obtuse. — A tall, smooth, elegant species, in 

 dry soils, Southern and Western States, common. Stem 4 — 81' high, slender, 

 terete. Divisions of the leaves 3 — 5' by % — 1-i-'. Rays spreading -V long. Outer 

 scales linear, obtuse, spreading, much smaller than tho inner. Jl. — Oct. (Chry- 

 sostemma, Less.) 



13 C. grandiflora Nutt. Glabrous; st. low, simple or branched; lvs. petiolate, 

 lanceolate, mostly pinnately or ternately divided, segments lance-linear or linear: 

 hds. solitary, on long peduncles, large ; rays 4 to 5-cleft at apex. — Mo. to Ala. 

 and Tex. Plant If high. Hds. much like No. 12. Jl. — Sept. 



14 C. lanceolata L. St. ascending, often branched below; lower lvs. ob- 

 lanceolate, petiolate, tho upper lanceolate, sessile, all entire, with scabrous margins; 

 hds. solitary, on very long, naked peduncles; rays 4 — 5-toothed at apex; ach. 

 euborbieular, with 2 small teeth. — % Native of tho Southern States. Heads 

 showy. Rays about 8, 1' by J'. Jn. — Aug. f 



15 C. auriculata L. Pubescent; lower lvs. roundish-ovate, petiolate, some of 

 them ivith 2 small, lateral segments at base (auriculate), the upper oblong, nearly 

 or quite sessile ; hds. few, on long peduncles ; outer scales oblong-linear. — Dry 

 soils, Va., Ky. to Ga. and La. Plant 1 to 3f high, variable. At first (May, Jn.) 

 it has divided lvs. and very long peduncles. Later (Jl., Aug.), it is tall, the lvs. 

 all entire, the lower having perished. lids, similar to No. 12. May — Aug. 



16 C. latifolia Mx. Very glabrous, tall; lvs. thin, opposite, ovate, acuminate, 

 unequally toothed, petiolate, tho upper ovate-oblong; hds. small; rays 5 to 6, en- 

 tire ; outer scales 4 to 5, linear, spreading. — Mts., N. Car. to Ga. Plant with am- 

 ple lvs. and few large, yellow rajs. Aug. 



17 C. argCita Ph. Smooth or nearly so ; sts. strict, striatc-angled ; lvs. of the 

 stem simple, petiolate, ovato and ovate-lanceolate, acuminate, mucrouato-scrrato ; 

 lids, few, large, on slender, naked peduncles ; outer scales about 8, as long as the 

 inner; rays 9 to 12, 3-cleft; ach. oblong, awns obsolete. — Car. (Pursh), W. Ga*, 

 in the upland districts. Differs much from C. aurea. St. 2 to 5f high. Lvs. 1 

 to 3' long. Rays spreading 1 V'. (Root lvs. not seen). May — Jn. 



18 C. aurea Ait. Nearly glabrous ; lower lvs. pinnately divided, upper ternately, 

 or simple; divisions ovate, lanceolate and lance-linear, acuminate, sharply serrate ; 

 outer scales about 8 ; linear as long as tho inner ; rays about 8, obtuse ; ach. teetfi 

 very short. — (§!) Ditches, etc., N. Car. to Fla. and La. An untidy weed, 2 to 4f 

 high. Hds. small, corymbed. Ach. 2" long. Aug., Oct. 



19 C. ariatcsa Mx. Sparingly pubescent ; lvs. pinnately 5 to 9-parted, segments 

 lance-linear, incisely serrate or pinnatifid ; hds. small, with conspicuous rays ; outer 

 invol. of 10 to 12 linear, green scales longer than the inner, villous at base ; aivns 

 slender, sprreading, about as long as the achenium. — (§) Low woods, W. States. St. 

 obtusely 4-angled, 2 to 3f high. Lvs. thin, 4 to 6' long, petioles & to 1'. Raya 

 8, orange-yellow, expanding 1£'. (C. involucrata Nutt.) 



20 C. trichosperma Mx. St. glabrous, square, dichotomous ; lvs. pinnately 5 to 

 1 -parted, briefly petiolate, segm. lanceolate, incised or serrate; scales of the outer 

 invol. ciliate, linear, long as the inner ; rays entire, large ; ach. narrow-cuneate, 

 with 2 short, stout aums. — (J) In wet grounds, N. Y., Mass. to Car. A smootli, 



