~ 
320 LXXV. COMPOSITZ. ASTER. 
serrate, petiolate; invol. scales loose, lanceolate.-—Low woods, N. and W. States 
and Can. Stem 2—4f high, dividing into many ascending, rigid branches, with 
numerous and crowded heads, forming a compound panicle of racemes. Heads 
small, each with about 12 rays, which are white or with various shades of 
blue. Leaves becoming smaller above, lanceolate and even linear. Sept. 
8. A. unpuULATUS. Wave-leaf Aster. 
St. paniculate, hispid; branches secund, leafy, 1-flowered; ls. oblong- 
cordate, amplexicaul, very entire, hairy, somewhat undulate or crenate-serrate, 
lower ones ovate, cordate, subserrate, with winged petioles—Native of dry 
woods, U. 8. Plant rough, about 2t high, with slender branches. Lower 
leaves on long winged petioles, cordate, acuminate, upper ones becoming nar- 
row-ovate and clasping. Flowers pale blue, solitary, forming a loose panicle 
of somewhat one-sided racemes. Aug. Sept. 
9. A. azureus. Lindl. (A. Oolentangiensis. Riddell.) 
Scabrous; st. and racemose paniculate branches rigid; lvs. lance-ovate, cor- 
date, slightly serrate, on hairy petioles, middle and upper ones lanceolate and 
linear, acute at each end, sessile, entire, highest subulate ; Ads. broadly obeonic ; 
scales oblong-linear, acute, appressed—Woods and prairies, Western States. 
Stem about 2f high. Leaves of several forms between the lowest cordate to 
the small, subulate, numerous floral ones of the slender branches. Racemes 
rather remote, panicled, with middle-sized heads. Rays blue. 
10. A. SHortu. Hook. Short’s Aster. 
Slender and nearly glabrous, simple or somewhat branched above; Jws. 
lance-ovate, cordate, petiolate, long-acuminate, subentire, upper ones sessile 
and obtuse at base; Ads. middle-size, racemose or racemose-paniculate, rather 
numerous; invol. broad-campanulate; scales scarious, close, green-tipped, shorter 
than the disk flowers.—A distinct and beautiful species, on rocky banks of 
streams, Ohio! to Ark. Stem a little flexuous, 2—4f high. Lower leaves about 
5! by 14’, the others successively diminished upwards to the flowers where they 
are minute. Rays violet blue. 
* * Lower leaves never cordate. Cauline leaves clasping and cordate or 
auriculate at base. 
11. A. paTens. (A. amplexicaulis. Willd.) Spreading Aster. 
St. simple, paniculate above, pubescent ; /vs. lanceolate, cordate, clasping 
the stem, acuminate, scabrous on the margin, pubescent; panicle loose, few- 
flowered; scales imbricate, lanceolate, lax, the points herbaceous.—Grows in 
moist grounds, Northern States. Stem 2—3f high, slender, branching above 
into a loose, terminal panicle. Leaves large, (3—6' long) on the stem, becom- 
ing small and bracteate on the branches. Heads solitary on the ends of the 
leafy branchlets, large, with 20—30 violet-colored rays. Aug.—Nov. 
12. A. Levis. (A. mutabilis. Linn. A. amplexicaulis. Muhl.) Smooth Aster. 
Very smooth; st. angular; branches simple, 1-flowered; lws. subamplexi- 
caul, remote, oblong, entire, shining, radical ones subserrate; invol. closely 
imbricate, the scales broadly-linear, rigid, thickened and herbaceous at the 
apex.—A very smooth and beautiful species, 2—3f high, growing in low grounds. 
Stem polished, green, often somewhat glaucous. Leavesrather fleshy, broadest 
at base, the lower ones tapering to a winged petiole. Flowers large andshowy, 
with numerous rays of a fine blue, becoming purple. Sept—Nov. 
6. levigatus. (A. levigatus. Willd.) Lvs. long, linear-lanceolate. 
y. cyaneus. (A. cyaneus. Ph.) St. andlvs. conspicuously glaucous.—These 
are beautiful varieties, especially the latter, which is perhaps the most beauti- 
ful of all the asters. 
13. A. concinnus. Willd., not of Nees. Elegant Aster. 
St. simple, paniculate at the summit, pubescent; Jvs. lanceolate and lance- 
linear, narrowed and clasping at the base, remotely serrate, upper ones entire ; 
invol. closely imbricate, scales green at the tip—Woods, N orthern States! 
A slender species, 1—2f high. Branches of the panicle rather short and re- 
mote, Leaves 3—5! long, acuminate, varying from 4—1’ in width, smooth ex- 
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