144 COMPOSITE. Aster. 



rose foliaceous summits; achenia canescent. — Nutt. I gen. 2. p. 15G, <^' in 

 trans. Amcr. phil. soc. I. c. ; Nees, Ast. p. 48 ; Hook. ! compan. to hoi. mag. 

 1. p. 97 ; DC. ! prodr. 5. p. 232. A. graveolens, Nutt. ! in jour. acad. 

 Philad. 2. p. 110, S^- in trans. Amer. piliil. soc. I. c. 



Rocks along rivers, and on dry prairies, from the upper Mississippi! and 

 Missouri ! to Arkansas ! Kentucky ! and Illinois ! Sept.-Oct.— Stems nu- 

 merous from the same root, often siifTruticose at the base, rigid, erect or 

 ascending, mucli branched, 1-2 feet high, somewhat hirsute or nearly gla- 

 brous befow: tlie branches, young leaves, and involucre covered, more or 

 less abundantly, with minute resinous and somewhat viscid granules, on 

 which account the plant exhales a heavy odor. Leaves 1 to 2 inches long, 

 varying from 2 to 5 lines in breadth, often nearly linear, abruptly acute or 

 mucronate, pale, rather rigid, reticulated, more or less scabrous with minute 

 strigose hairs, particularly on the margins which are sometimes scabrous- 

 ciliate ; the upper ones more manifestly sprinkled with resinous dots, which 

 are frequently pedicellate, so as to appear like glandular hairs ; those of the 

 branchlets small, often crowded, gradually passing into the scales of the 

 involucre. Heads very numerous, scarcely as large as in A. Carohnianus ; 

 the scales of the involucre with more or less prolonged foliaceous summits, 

 which are squarrose-spreading or at length reflexed ; all equal in length, or 

 the exterior somewhat sliorter. Eays purple or violet. Achenia canescent 

 with a fine closely appressed pubescence. Pappus brownish. — The nume- 

 rous specimens before us afford no characters to distinguish the A. graveolens 

 from the A. oblongifolius of Nuttall. 



69. A. amethystinus (Nutt.) : hirsute with a close somewhat cinereous 

 pubescence; stem racemose-paniculate; leaves numerous, linear-lanceolate, 

 entire ; strigose-scabrous, acute, partly clasping by a dilated or auriculate 

 base; scales of the involucre somewhat equal, not glandular or viscid, linear, 

 acute, erect, with squarrose foliaceous tips; achenia silky. — Nutt.! in trans. 

 Amcr. phil. soc. (n. set.) 1. p. 294. 



Near Boston and Salem, Massachusetts, Nuttall! Mr. Little! Sept.? — 

 We have only seen branches ; with leaves about an inch long, abont 2 lines 

 wide, thickish, minutely reticulated, pale, strigose under a lens: the nu- 

 merous racemose branchlets are furnished with similar leaves of a smaller 

 size, and bear one to three or four heads, scarcely half the size of those of 

 A. Novge-Anglise. Involucre about the length of the disk ; the scales minute- 

 ly strigose ; the exterior slightly spatulate, the lower whitish portion some- 

 what narrowed ; the innermost rather longer and more attenuated. Rays 

 numerous, azure according to Nuttall, appearing violet in dried specimens. 

 Pappus turning brownish. — Resembles A. oblongifolius. 



t t Scales of the involucre loose, very narrow (glandular-viscid), appearing as if 

 nearly in a single series. 



70. A. Novce-Anglife (Linn.) : stem stout, hispid, corymbose at the sum- 

 mit; the branchlets and involucre somewhat viscid ; leaves very numerous, 

 lanceolate or lanceolate-linear, auriculate-clasping, entire, acute, clothed with 

 a close somewhat scabrous pubescence ; scales of the involucre narrowly 

 subulate-linear, lax, equal, as long as the disk; achenia villous-hirsute. — 

 Livn. hort. Cliff, p. 408, S^' spec. 2. p. 875 ; Ait. Kew. {ed. 1) 3. p. 201 ; 

 Mich.T.! ji. 2. p. 113 ; Pursh, fl. 2. p. 549 ; Nutt.! gen. p. 156; Ell.! sTc. 

 2. p. 351 ,• Lindl. hot. reg. t. 183 ; Bigel.fl. Bost. ed. 2. p. 310 ; Nees, Ast. 

 p. 46 ; HooTc. ! Ji. Bor.-Am. 2. p. 8 ; Darlingt. ! fl. Cest. p. 462 ; DC. ! 

 prodr. 5. p. 233. A. Novse-Anglise altissimus, &c., Herm. paracl. Batav. t. 

 98. Asteropholis, Pont. diss. p. 242. A. amplexicaulis. Lam. diet. 1. p. 

 304; not of IVilld., nor of Michx. A. spurius, Willd. sp)ec. 3. p. 2032; 

 Nees, synop)s. p. 20. 



