126 COMPOSITE. Aster. 



Hook. ! jl. Bor.-Am. 2. p. 12, Sf in DC. prodr. 5. p. 241. A. ramulosus c, 

 Lindl. f in HooTc. I. c. p. 13, S^'in DC. I. c. p. 243. A. bracteolatus, Nutt. 

 in trans. Amer. j^hil. soc. I. c. ? 



Arctic America, from Fort Franklin on the Mackenzie .River, to Cum- 

 berland House on the Saskatchawan, Richardson ! — Stem 1-2 feet high. 

 Leaves very numerous, li-2 inches long, 1-nerved or obscurely 3-nerved, 

 usually broadest at the base, abruptly acute or obtuse, but tipped with a mu- 

 cronate bristle. Heads in a simple or more or less compound narrow raceme, 

 larger than the ordinary states of A. multiflorus ; the scales of the nearly 

 glabrous involucre more loose, equal, and acute. — The A. falcatus and the 

 typical A. ramulosus of Lindley (from Fort Franklin and Cumberland House) 

 appear to us entirely similar ; and the affinity of the species is clearly with 

 A. multiflorus. 



41. A. Nuttallii: smooth and nearly glabrous ; branches racemose, simple, ' 

 rather naked, bearing solitary or few heads ; leaves linear, rigid, entire, with 

 scabrous margins ; the upper sessile or somewhat clasping by a broad base ; 

 the radical and lowest cauline lanceolate, tapering into a petiole ; scales of 

 the involucre unequal, closely imbricated, linear-oblong, with short herba- 

 ceous tips; the exterior obtuse. — A. ramulosus, Nutt.! in trans. Amer. phil. 

 soc. {n. ser.) 7. p. 293, not o( Lindl. 



Plains of Lewis River, near the Rocky Mountains (about lat. 42°), Nut- 

 tall ! — Plant 6-12 inches high, nearly glabrous to the naked eye ; the branch- 

 es mostly bearing single subglobose heads, of about the same size of those of 

 A. ramulosus. Leaves coriaceous, acute ; those of the branches few and 

 small. Involucre hemispherical-campanulate, at length widely hemispheri- 

 cal, nearly glabrous ; the scales appressed, obtuse or abruptly acute ; the 

 exterior successively shorter. — Allied to the preceding, but apparently quite 

 distinct. 



42. A. campestris (Nutt.) : viscid-puberulent ; cauline leaves oblong-li- 

 near, entire, mostly obtuse, closely sessile, slightly clasping; the radical 

 ones oblanceolate, serrulate towards the summit, tapering into a petiole ; 

 heads racemose or slightly panicled ; scales of the involucre lanceolate, very 

 acute, viscid, rather loosely imbricated in about 3 series, somewhat spread- 

 ing. — Nutt.! in trans. Amer. phil. soc. I. c. 



" Plains of Lewis River, in the Rocky Mountain region : with A. ramu- 

 losus [A. Nuttallii], which it closely resembles, but differs in being every 

 where somewhat pubescent and viscid, with a strong scent, dec. Stem 

 about a foot high." Nuttall! — Heads as large as in the preceding. Involu- 

 cre rather shorter than the ferruginous pappus. Ovary pubescent. 



43. A. bracteolatus (Nutt.) : stem pulverulently pubescent ; leaves linear 

 or oblong-linear, acute, sessile, entire ; heads racemose-paniculate, mostly 

 solitary on the leafy branches; involucre smooth, spreading; the scales ob- 

 long, somewhat acute ; the outermost similar to the branch leaves. — Nutt. 

 in trans. Amer. pihil. soc. I. c. 



" With the preceding, to which it is nearly allied, but remarkable by the 

 smooth leaf-like involucrum. The radical leaves are unknown. Stem and 

 branches more leafy than in the two preceding ; the leaves nearly all similar. 

 Flowers lilac-purple, rather large. Nuttall. — This species is unknown to 

 us : we introduce it here on account of the resemblance it is said to bear to 

 the preceding. 



********* ffgads (viiddk-sizcd or smaW) mostly racemose : scales of ike in- 

 volucre iml/ricated and unequal in length, meiniranaceo-herbaceous, icith short ap- 

 pressed or somewhat spreading (not squarrose) greenish tips: achenia minutely pu- 

 bescent or nearly glabrous : rays (13-30) usually pale or white, often small : stems at 



