162 ORDER 70. COMPOSITE. 



8 A. splnulosus Chapm. Bristly-hairy, rigid ; Ivs. narrowly linear, pungent, briptlo 



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



9 A. ery iigiiolius T. & G. Hairy, rigid ; Ivs. lance-linear, pungent, fringed with 



spiny teeth; heads very large, 14, loosely racemed ; scales green, rigid, lanceolate, 

 long-pointed ; rays many, white. Fla. 1 2f. (Prinopsis Chapraanii, C-B.) 



10 A. cordif'olius L. Stem paniculate; leaves sharply serrate, acuminate ; petioles 

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

 1 3f. Heads numerous, rather small, blue varying to white, in a large panicle. 



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

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



12 A. undula-tiis L. Racemous-paniculate, rough, grayish ; Ivs. ovate-oblong, undu- 

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

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



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

 ISA. azureus Lindl. Slender, rigid, rough; Ivs. below on slender petioles, cordate- 

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

 rac. paniculate, heads obconic : scales acute, appressed. Woods, prairies, W. 2f. 



14 A. Sliortii Hook. Smoothish, subsimple ; Ivs. lance-ovate, deeply cordate, peti- 

 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. anomalus Eng. Lvs. as in No. 13; scales with linear, spreading, leafy tips ; 

 hds. large; rays spreading, 15 IS", bright blue. Rocks, 111. Mo. (Mr. J.Wolf.) 2 4f. 



16 A. sericeus 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. coiicolor 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. 



IS A. squarrosus Walt. Slender, with simple, 1-flowered brar.ches ; leaves very 

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

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



19 A. adnatus 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. 



20 A. turbiiiiiellus Lindl. Smooth, subcorymbed ; Ivs. lance., tapering both ways ; 

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



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

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

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



/3. Itevigtilus* Not glaucous ; leaves linear-lanceolate ; scales linear. 



"/. cyaneug. Plant glaucous ; leaves thickened, very entire. Beautiful Aster?. 



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

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

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



$. phlog-ifoltuKt Leaves lance-ovate, auriculate-clasping, very acute. 



23 A. ametliystinus N. Hoary-puberulent ; rac. paniculate; Ivs. lin.-oblong, acute, 

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

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



2 I A. Novae-Aiigliae L. Corymbous-paniculate, pubescent ; Ivs. lanceolate and 

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

 length; rays 70 + , deep purple. Damp. 4 Of. Varies with the rays rose-purple, or 

 rarely, white. Fine in cultivation. 



25 A. Carolinianus Walt. Rough-downy; branches divaricate: Ivs. lance-ovare, 

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

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



20 A. puniceus L. Hispid, panicled; Ivs. lance-oblong, auriculate-clasping, flp 



