4-2^ Oiu>Kii 70. COMPOSITE. 



2 if high, 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 fe\v)- 

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

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

 invol. closely imbricate. Dry woods, 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. pale blue, solitary or somewhat clus- 

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



/?. DIVERSIFOLIUS. Very slender; Ivs. shorter in proportion, ovate and oblong; 

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



11 A. azftreus Lindl. Scabrous; st. and racemous-paniculate branches slender 

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

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

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

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

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

 c-led, with middle sized heads, sometimes reduced to a single raceme or head ! 

 Rays blue. Aug., Oct. (Should the scales become loose and somewhat spreading, 

 it would be A. anomalous, Engelm. ex. descr.) 



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 base ; hds. middle-size, racemous or racemous-panicu- 

 late, rather numerous ; invol. broad-campanulato ; 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 if high. Lower leave* 

 about 5' by !', the others successively diminished upwards to the flowers wheru 

 they are minute. Rays violet blue. 



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

 Ivs. very small, triangular, cordate-amplexicaul, reflexed-squarrous / hds. terminal ; 

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

 pubescent. K 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, mucronate, 1 to 2" long. Hds. middle size, with near 20 showy bluo rays. 

 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 

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

 La. Sts. shrubby at base, 1 to 2f high. Lvs. as small as in the last, hds. and 

 fls. 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 the branchlets ; scales imbricate, lanceolate, lax, only the points herba- 

 ceous. Grows in moist grounds, Mass., N. Y., to Ga. (Feay, Pond.) St. 2 to 3f 

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

 J to J as wide. Hds. large, with 20 to 30 violet-colored rays. Pappus tawny. 

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



6. PHLOGIFOLIUS. Simple or racemous-paniculate; Ivs. lance-ovate, cordate- 

 auriculate, very acute, edges ciliate; hds. largo, spreading 16". Pappus 

 deeply tawny. N. Y. to Ohio. 



16 A. Novse Anglias L. Hds. terminal, crowded, someivhat fastigiate ; st. hispid, 

 paniculate; Ivs. linear-lanceolate, amplexicaul, aurieulate 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 the M. 

 and W. States than in N. Eng. St. 4 to 6f 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 

 (75 to 100). Pappus deeply tawny. Ach. hairy. Sept. f 



