AsTEB. LXXV. COMPOSITE. 323 



* * * * Leaves neither cordoAe nor auriculate, the margin entire or subentire. 

 t Scales erect. 



27. A. sERiCEUs. Vent. (A. argenteus. Mlchx.) Silk-leaved Aster. 



Sts. slender, clustered, glabrous below, silky-pubescent and branched 

 above ; Ivs. clothed on both sides with a dense, appressed, silky-canescent pubes- 

 cence, lance-oblong, entire, acute and mucronate, sessile; Art's, large, mostly 

 solitary, terminal on the short, leafy branchlcts ; scales lanceolate, silky-canes- 

 cent like the leaves, spreading at tip.— A singularly elegant Aster, with shin- 

 ing, silvery foliage, prairies ! and river banks ! Wis. and Iowa, to Miss. Stem 

 1— 2f high. Lower leaves 2—3' by f— U', the upper much smaller. Rays 

 deep violet-blue. Aug. — Oct. -f 



28. A. coNcoLOR. Oiie-cohred Aster. 



St. subsimple, erect, pubescent; Ivs. lance-oblong, entire, mucronate, gray- 

 ish, with a minute, silky pubescence both sides, upper ones cuspidate-acumi- 

 nate ; rac. terminal, virgate, simple or somewhat compound, elongated; scales 

 lanceolate, silky, acute, appressed. — Pine barrens, N. J. to Flor. A slender and 

 virgate plant, 1 — 3f high, sometimes branched below. Root often tuberous. 

 Leaves l\' by i', reduced in size upwards. Heads in a long raceme, with blue 

 rays and a rust-colored pappus. 



29. A, TURBiNELLUs. Llndl. 



Smooth or slightly scabrous ; branches and branchlels very slender ; Ivs. 

 lanceolate, tapering to each end, acute, slightly clasping, entire, those of the 

 branches linear, and of the branchlets subulate ; invol. turbinate, acute at base, 

 as long as the disk flowers ; scales imbricated in many rows, linear, obtuse, 

 with short green tips. — Woods and river bottoms, 111. Mead, Mo., &c. to La. 

 Stems 2f high, with the branches numerous and somewhat corymbose. Lower 

 leaves 3—5' by f— U', the others gradually reduced upwards to the scales of 

 the obconic or top-shaped involucre. Heads middle-size, with blue rays and 

 brovrnish pappus. Sept. 



30. A. DUMosus. Bushy Aster. 



Nearly smooth ; Am/? cAi's racemose-panicled ; Us. numerous, smooth, li- 

 near, sessile, entire or subscrrate, those of the branches very short ; invol. cyl- 

 indrical, closely imbricate. — About 2f high, in dry shades and borders of woods, 

 U. S. Stem much branched, smooth or slightly pubescent, with long, linear 

 leaves, those of the branches smaller and becoming very minute. — Heads mid- 

 dle sized, scattered, solitary, with about 24 purplish white rays. Cluite varia- 

 ble. Sept. 



/?. follosus. (A. foliosus. Ait.) St. racemose-compound; Ivs. acute, often ser- 

 rulate ; scales narrower, subacute. 



y. stricllor. (A. fragilis, Lindl.) Somewhat paniculate ; branch Zmt*c5 rather 

 numerous and appressed. 



31. A. CARNEU.S. Flesh-colored Aster. 



Smooth ; st. dividing into many straight, racemose, leafy branches ; Ivs. 

 uniform, linear-lanceolate, acuminate, entire, the lower ones tapering to a ses- 

 sile base, the upper amplexicaul ; scales acute, much shorter than the disk. — A 

 handsome bushy Aster by fences, &c. (Claremont!) N. H., W. to la. Rare. 

 Stem about 2f long, often purple. Stem leaves 3 — 5' by \ — i', branch leaves 

 much smaller. Heads numerous, middle-size, somewhat secund, each with 

 20 — 30 pale purple, narrow rays, Sept. Oct. 



32. A. GRAMiNiPOLius. Ph. Grass-leaved Aster. 



Suhpubescent ; st. slender, branched above ; hncer Ivs. very numerous, nar- 

 row-linear; pcd. slender, 1-flowered; smles linear-subulate, loose, scarcely im- 

 bricated. — N. H. Eddy. Hiffh cliffs, Willoughby Lake, Vt. ! Branches simple, 

 leafv, naked at the end, 1-flowercd, somewhat corjTnbose. Rays 15 — 25, mucli 

 longer than the disk, purple or ro.se-colored. 



1 1 Outer scales spreading or aquarrose. 



33. A, ERicolDE.s. Ihath-likc Astrr. 



Nearly or quite .smooth; branches virgate, spreading, paniculate; Ivs. 

 linear or linear-lanceolate, verv smooth, those of the Wanches subulate and ap- 

 28 



