1C2 ORDER 70. COMPOSITE. 



8 A. splnnlosus Chapm. Bristly-hairy, rigid; Ivs. narrowly linear, punerent. nript'o 



fringed : heads few, spicate ; scales spine-pointed ; rays 13, blue. Fla. If. 



9 A. erj'iijjtfolius T. & G. Hairy, rigid: Ivs. lance-linear, pungent, fringed with 



spiny teeth ; heads very large. 1 4, loosely racemed ; scales green, rigid, lanceolate, 

 long-pointed ; rays many, white. Fla. 1 2f. fPrinopsis Chapmanii, C-B.) 



10 A. cordil'oliiis L. Stem paniculate ; leaves sharply serrate, acuminate ; petioles 

 winged: scales appressed, with short green tips. Woods and glades, N. and W. : coin. 

 l--:if. Heads numerous, rather small, blue varying to white, in a large panicle. 



11 A. sagittifollug Willd. Branches racemed; Ivs. lance-obi., some arrow-shaped ; 

 petioles winged ; scales loose, lin. -subulate. Low woods, N. and W. 2-4f. Wh.-blue. 



14 A. uiidula.tns L. Racemous-paniculate, rough, grayish ; Ivs. ovate-oblong, ur.du- 

 late-creuato, the base, or the winged petioles, cordate-clasping, the upper acute, en- 

 tire, sessile : scales appressed. Dry woods. 2f. Blue. (A. diversifolius MX.) 

 /3. axptrulut. Lowest petioles slender, not clasping ; Ivs. scarcely cordate. Com. 



ISA. azure its Lindl. Slender, rigid, rough ; Ivs. below on slender petioles, cordaio- 

 lanceolate, the others successively lanceolate, linear, and subulate, acute at each end : 

 rac. paniculate, heads obconic; scales acute, appressed. Woods, prairies. W. 21' 



14 A. Shortil Hook. Smoothish, subsimple ; Ivs. lance-ovate, deeply cordate, pet'- 

 olate, long-pointed, entire, the upper sessile; rac. paniculate ; scales green-tipped, 

 shorter than the disk. Rocky banks, O. to Wis. and Ark. 3f. 



15 A. anomaltifl Eng. Lvs. as in No. 13; scales with linear, spreading, leafy rips; 

 lids, large; rays spreading, 15 18", bright blue. Rocks, 111. Mo. (Mr. J. Wolf.) -1 -If 



Irt A. BericeuK Vent. Bushy ; Ivs. silvery-silky both sides, lance-oblong, sessile : hr!s 

 large, terminal on the short, leafy branches ; scales spreading at tip ; fr. glabrous ; 

 rays 1525. violet blue. Banks, Mich. (H. Mapes) to Iowa, and S. 1 2f. 



17 A. concolor L. Subsimple; Ivs. grayish-silky, lance-oblong, the upper cusp- 

 pointed : heads in a terminal, virgate raceme; scales lanceolate, appressed; fruit 

 silky ; rays purple. Pine-barrens, N. J. to Fla. 2 3f. Aspect of Liatris. 



18 A. squarrosus Walt. Slender, with simple, 1-flowered branches; leaves very 

 small, triangular, heart-clasping, rcflexed-squarrous ; scales with spreading grcer. 

 tips ; fr. pubescent. Dry soils, S. ft 3f. Rays 20. blue. 



19 A. ad nii tu* N. Slender, rough ; Ivs. oblong to lanceolate, erect, adhering to the 

 stem by the midvein, the summit only free. Sands, Fla. to La. 2 3f. 



!JO A. t n rbl ii ii el 111 8 Lindl. Smooth, subcorymbed ; Ivs. lance., tapering both ways ; 

 hds. club-top-shaped (6") ; sc. tips short, blunt. 111. Mo. to La. Blue. Pap. brown. 



21 A. lasvls L. Very smooth; branchlets 1-flwd. ; Ivs. oblong, entire, shining, lowest 

 lanceolate, subserrate, upper auriculate ; scales with a broad, acute, appressed tip ; 

 heads large, rich blue, showy. Low woods. 2 3f. 



ft. Itrvt&tilii*. Not glaucous ; leaves linear-lanceolate ; scales linear. 



y. ri/iinen*. Plant glaucous ; leaves thickened, very entire. Beautiful Asters. 



22 A. patens L. Pubescent; rac. paniculate ; Ivs. ovate-oblong, cordate-clasping, 

 ciliate at edge ; heads large, terminal on the leafy branchlets ; scales lax, green-tipped ; 

 rays 20. violet-blue. Wet soils. Mass, to Ga. 2 3f. 



/3. pMog-tfbllu*. Leaves lance-ovate, atiriculate-clasping, very acute. 



23 A. amethyst i mis N. Hoary-puberulent ; rac. paniculate ; Ivs. lin. -oblong, acntc, 

 some auricled at the clasping base ; heads broad-bell-shaped (3") ; scales erect, with 

 only the green tips spreading. Damp, Mass, to 111. (J. Wolf.) 2 3f. 



2 I A. Novte-Angllie L. Corymbous-panicnlate, pubescent; Ivs. lanceolate and 

 lance-linear, auriculate-clasping ; scales equal, lax, glandular- viscid, green their whole 

 length; rays 70 + , deep purple. Damp. 4 6f. Varies with the rays rose-purple, 01 

 rarely, white. Fine in cultivation. 



25 A. Carollnlanns Walt. Rough-downy; branches divaricate: Ivs. lance-ovate, 

 entire, clasping with small auriculate lobes ; heads very large, scattered : scales witb 

 spreading green tips ; rays rose-purple. Damp, S. 6 13f. 



20 A. mmieeu* L. Hispid, panicled: Ivs. lanee-ohlong, anriculato-o.lasping, np- 



