4*22 OaDKH 70. COMPOSITE. 



2 4f liigli, dividing into many ascending, rigid branches, with numerous and 

 crowded heads, forming a compound panicle of leafy 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 



10 A. undulatus L. St. paniculate, puberulent ; branches bracted, 1 (or few)- 

 flowered; Ivs. oblong-cordate, atnplexicaul, entire, hairy, somewhat undulate or 

 creuate-serrate, lower ones ovate, cordate, subserrate, with winged petioles; 

 invol. closely imbricate. Dry wood*, U. S. Plant rough, about 2f high, with 

 slender branches. Lower Ivs. on winged petioles, cordate, acuminate, upper ones 

 becoming narrow-ovate and clasping. Fls. palo blue, eolitary or somewhat clus- 

 tered, forming a loose, racemous panicle. Aug., Sept. 



/3. DIVKRSIFOLIUS. Very slender; Ivs. shorter in proportion, ovate and oblong; 

 branches slender, 1-flowered. South (Pond.) (A diversifolius, MX.) 



11 A. azureus Lindl. Scabrous; stand racemous-panicu'.ato branches slender 

 but rigid; IDS. lance-ovate, cordate, slightly serrate, on slender petioles, middle and 

 vpper ones lanceolate and linear, acute at each end, sessile, entire, highest subulate ; 

 hds. broadly obconic ; scales oblong-linear, acute, oppressed. Woods and prairies, 

 W. States. St. about 2f high. Lvs. of several forms between the lowest cordate 

 to the small, subulate, numerous, floral ones of the slender branches. Rac. pani- 

 ded, with middle sized heads, sometimes reduced to a single raceme or head) 



11} A. anomalus Eng. Lvs.nsinjSTo.il. Invol. with loose recurved scales. 

 Limestone clifl's. Til. (j'. Wolf), Iowa (Dr. Cousins), and Mo. Hds. large, handsome. 



12 A. Shortii Hook. Slender and nearly glabrous, simple or somewhat branched 

 above ; Ivs. lance-ovate, deeply cordate, petiolate, long-acuminate, entire, upper 

 ones sessile and obtuse at baso; hds. middle-size, racernous or racemous-panicu- 

 late, rather L.umerou.5 ; invol. broad-campanulate ; scales scarious, close, green- 

 tipped, shorter than (he disk flowers. A distinct and beautiful species," on rocky 

 hanks of streams, Ohio, to Ark. Stem a little fiexuous, 2 4f high. Lower leave.; 

 ;tbout 5' by !', tho others .successively diminished upwards to the flowers where 

 they are minute. Rays violet blue. 



13 A. squarrosus Walt. Very slender, scabrous, with long, simple branches ; 

 Ivs, very small, triangular, cordatc-amplexicaul, reftexed-squarrous ; hds. terminal; 

 invol. obconic, scales imbricated with ovate, green, squarrous points; achenia 

 pubescent N. Car. to Fla. in dry soil. A very singular Aster, 2f or more high, 

 rigid, shrubby at base. Lower Ivs. remote, 1' long, middle and upper crowded, 

 stiff, mucronntc, 1 to 2" long. lids, middle sbe, with near 20 showy blue ray; . 

 Pappus rather tawny. Sept. -Nov. 



14 A. adnatus Nutt. Scabrous; stems and branches ascending, very slender; 

 Ivs. oblong-ovate or lanceolate, approximate, erect, and adherent to the stem by the 



. midmin, the summit being free. A still more curious species, found in Fla. to 

 La. Sts. shrubby at base, 1 to 4f high. Lv.?. as small a3 in tho last, hds. and 

 lls. also similar. Sept. Nov. 



15 A. patens L. St. simple, paniculate above, pubescent ; Ivs. ovate-oblong, 

 acute, cordate-clasping, scabrous on the margin pubescent; pan. loose; hds. ter- 

 minal on tho branchlets ; scales imbricate, lanceolate, lax, only the points herba- 

 ceous. Grows in moist grounds, Mass., N. Y., to Ga, (Fcay, Pond.) St. 2 to 31 

 high, slender, branching above into a loose spreading panicle. Lvs. 1 to 3' long, 

 \ to as wide. Hds. largo, with 20 to 30 violet-colored rays. Pappus tawny. 

 Aug. Nov. Variable. (A. amplexcaulis Willd.) 



if. PHLOGIFOLIUS. Shr:plo cr racemous-panlculate ; Ivs. lance-ovate, cordate- 

 auriculate, very acute, edges ciliatc; hd& large, spreading 1G". Pappus 

 deeply tawny. X. Y. to Ohio, 



16 A. Novae AugliED L. JId?> terminal, crowded, tomawluii fastigiate; st. hispid, 

 paniculate; lv^. linear-lanceolate, amplcxicaul, auriculate at base; scales equal 

 lax, linear-lanceolate, rather longer than the disk, green their whole length. A 

 large and beautiful Aster, in fields, meadows and shades, more common in tho M. 

 and W. States than hi N. Kng. St. 4 to Gf high, straight, erect, viscidly hairy, 

 colored. Lvs. very numerous, entire, with 2 auricular appendages at base. Fls. 

 large, in a kind of loose, paniculate corymb. Ray-fls. deep purple, numerous 

 (1i> to 100). Pappus deeply tawny. Ach. hairy. Sept f 



