376 COMPOSITvE. Bahia. 



Rocky Mountains ! to the coast of Oregon ! and Nootka, &c. July. — 

 Stems 5-12 inches high. Leaves an inch or more in length ; the upper linear. 

 Heads 25-35-flovvered, as large as in the preceding; the scales about 12, 

 oval-oblong. Pajipus of mostly 4 oblong or lanceolate acutish scales, and as 

 many alternate smaller scales, the latter often denticulate at the apex. The 

 leaves vary greatly. 



7. E. gracilis {Hook. & Arn.) : lanuginous-tomentose throughout; stems 

 branched from the base, naked above; leaves alternate, attenuate, linear, ob- 

 tuse, entire; the lower somewhat spatulate; heads terminating the long 

 simple peduncles; rays large; achenia glandular-pubescent. — Hook. ^'Arn.! 

 bat. Beechey, suppl. p. 353. 



Interior of Oregon, Snake Fort, Mr. Tolmie ! — Stems slender, 8-10 inches 

 high. Leaves nearly 2 inches long, about a line wide. Scales of the involucre 

 oblong. Rays bright yellow in the dried specimens. Pappus of about 10 

 small oblong scales. 



X Species unJcnown to us. 



8. B. opjyositi folia (Nutt., under Trichophyllum) : decumbent and much 

 branched, canescently pubescent ; leaves opposite, all palmately 3-cleft ; the 

 segments ligulate, simple, or divaricately subdivided ; peduncle filiform, 

 mostly dichotomal, scarcely longer than the leaves. Nuit. — DC. prodr. 5. p. 

 657. Trichophyllum opposltifolium. Null. gen. 2. p. 167. 



Denudated sterile hills near Fort Mandan on the Missouri, abundant. 

 July-Aug. — It ? Stem diffuse, 6-12 inches high. Leaves petiolate, canes- 

 cent; the pubescence very short : segments about an inch long, thickish, li- 

 near, somewhat obtuse. Peduncle slender, 1-2 inches long. Involucre ob- 

 long-cylindrical ; the scales 5-8, oblong-ovate : rays about the same number, 

 very short. Pappus minute, of 5-8 partly obtuse and somewhat lacerate 

 scales. Achenia nearly smooth. Plant sensibly bitter, and destitute of 

 aroma. Nutlall. 



120. ACTINOLEPIS. DC. prodr. 5. p. 655; Hook. ic. pi. t. 325. 



Heads several-flowered ; the ray-flowers 3-5, ligulate, pistillate ; those of 

 the disk tubular, perfect and fertile ! Involucre oblong-campanulate, bracte- 

 ate at the base, tomentose ; the scales about 5, oblong-obovate, obtuse, con- 

 nivent after flowering, and involute so as to include the achenia of the. ray. 

 Receptacle small, convex, naked. Rays slightly exserted, oval, mostly 

 2-toothed, raised on a slender tube. Corolla of the disk with a slender tube 

 (pubescent with jointed hairs), and a spreading deeply 5-lobed limb. 

 Branches of the style in the disk-flowers short, rather flat, terminated by a 

 very obtuse puberulent cone, or almost truncate. Achenia slender, terete, 

 striate, tapering to the base ; those of the ray minutely hairy, crowned with 

 a (somewhat deciduous?) pappus of 10-15 narrow and almost aristiform. 

 acute unequal scales, slightly united at the base ; those of the disk similar, 

 but glabrous and destitute of pappus. — A low (2-6 inches) and slender dif- 

 fusely branched annual herb, clothed with loose somewhat deciduous wool ; 

 the stems corymbosely branched. Leaves alternate (opposite, DC), very 

 small (2-3 lines long), sessile, cuneate-obovate, deeply and very obtusely 

 3-toothed at the apex. Heads small, solitary and sessile in the forks of the 



