302 LXXV. COMPOSITA. ASTER. 
and narrow, midvein hirsute; Ads. racemose or spicate, upper in short, dense. 
bunches; scales linear. 
20. A. stmpLex. Willd. (A. salicifolius. Darl.) Willow-leaved Aster. 
Glabrous; st. racemose-paniculate above; dvs. lanceolate, acuminate, en- 
tire, the margins scabrous, lower ones serrate; scales loosely imbricated, linear- 
subulate.—Another variable species in low grounds, U. 8. and Can. Stem 
1—5t high, somewhat corymbose. Leaves 2—4/ by 5—10”, very smooth both 
sides, tapering to a slender point; those of the branches and branchlets propor- 
tionately smaller. Heads rather few, middle size, on the short branchlets. Sept. 
B. altior. Branches hirsute or pubescent; ids. above the middle size, with 
blue rays.—Stem 4—6f high. 
y. humilior. Branches pubescent, with short, crowded spikes of small heads ; 
rays pale blue-—Stem 1—2f high. 
6. recurvatus. Diffuse, with long, spreading or recurved branches; Ads. loosely 
racemed ; rays bluish-white—Western ! 
21. A. renuirouius. Narrow-leaved Aster. 
St. smooth, erect, paniculate-branching, with 1-flowered branchlets; dvs. 
linear-lanceolate, tapering at each end, long-acuminate, entire, with roughish 
margins, the lower ones often serrate in the middle; zmvol. scales lax, acute.— 
Grows in moist fields, Can.to Va. Stem leaves 2—4’ long, those of the branches 
and branchlets proportionately smaller. Heads small, with numerous (20—30), 
long, pale purple rays. Sept. 
92. A. Greenel. Torr. & Gray. Greene’s Aster. 
St. glabrous, racemosely branched; lvs. glabrous, subclasping, remotely 
appressed-serrulate, scabrous above, lower narrow-lanceolate, upper short, nu- 
merous, ovate-lanceolate; Ads. rather small, on short, bracted peduncles.—Near 
Boston. Dr. B. D. Greene, Dr. Pickering. Cauline leaves 3—5! long, ramial 
leaves much smaller. 
93. A. Novi-Beieu. New York Aster. 
_ Glabrous; s¢. terete, stout, often glaucous; lvs. rather rigid, lanceolate, 
acute, the lower subserrate and subclasping ; Ads. racemose or corymbose; scales 
rather loosely imbricated, lanceolate, subequal, with acute green tips; rays 
numerous.—A smooth, handsome Aster in Western and Southern States, not 
common. Stem 2—4f high, with few, straight, somewhat corymbose branches. 
Leaves 4—6’ long, tapering to each end, rough-edged, upper ones much smaller. 
Heads rather large. Rays pale blue, expanding 9—12”. Aug.—Oct. 
+t Scales spreading or squurrose at tip. 
24. A. Laxus. Loose-stalked Aster. : 
St. loosely corymbose-panicled above; Jvs. linear-lanceolate, acuminate, 
rough-edged, lower ones subserrate, those of the stem subreflexed, of the branches 
much spreading ; invol. imbricate, scales lanceolate, acute, reflexed at the apex. 
—Fields, Mass., N. Y. Stem 2—3f high, with small, bluish flowers. Sept. Oct. 
25. A. Laxirouius. Nees. Loose-leaved Aster. 
St. scabrous ; rac. compound ; branches racemose at the summit or slightly 
compound; Jvs. linear-lanceolate, elongated, mucronately serrulate, attenuate 
at each end, clasping at base, scabrous above; scales squarrose. ‘ 
. letiflorus. T. & G. St. slender, with long, filiform, spreading branches ; 
lvs. rather rigid and very scabrous; rac. loose, the pedicels nearly leafless— 
Ohio and Wis. Described by Drs. Torrey g Gray as a very graceful plant of 
considerable size, with very long, narrow leaves, and numerous, long, showy, 
pale purple rays. ; 
26. A. Lonairotivs. Lam. (A. levigatus. Ph.) Long-leaved Aster. 
Glabrous; st. very branching, branches many-flowered; dvs. subamplexi- 
caul, linear-lanceolate, lower ones serrate, smooth; invol. scales lax, lanceolate, 
nearly equaling the disk.—Fields and thickets, N. Y. to Car. Stem 3f high. 
Leaves pale below, shining above, smooth both sides, the lower ones 4—6’ long. 
Heads numerous, showy, with 25—30 light blue rays. Noy. . 
