12 A. Shortii Hook. Slender and nearly glabrous, simple or somewhat branched above; lvs. lance-ovate, deeply cordate, petiolatc, long-acuminate, entire, upper ones sessile and obtuse at base; hds. middle-size, racemous or racemous-panicu-late, rather numerous; invol. broad-campanulate; scales scarious, close, green-lipped, shorter than the disk flowcers. - A distinct and beautiful species, on rocky banks of streams, Ohio to Ark. Stem a little flexuous, 2 - 4f high. Lower leave; about 5' by 1 1/2' the 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; lvs. very small, triangular, cordate-amploxicaul, reflexed-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 lvs. remote, 1' long, middle and upper crowded, stiff, mucronate, 1 to 2" long. Hds, middle size, with near 20 showy blue rays. Pappus rather tawny. Sept. - Nov.

14 A. adnatus Nult. Scabrous; stems and branches ascending, very slender; lvs. oblong-ovate or lanceolate, approximate, erect, and adherent to the stem by the midain, the summit being free. - A still more curious species, found in Fla. to La. Sts. shrubby at base, 1 to 4f high. Lvs. as small as in the last, hds. and fls. also similar. Sept. - Nov,

15 A. patens L. St. simple, paniculate above, pubescent; lvs. ovate-oblong, acute, cordate-clasping, scabrous on the margin pubescent; pan. loose; hds. terminal on the branchlets; scales imbricate, lanceolate, lax, only the points herbaceous. - 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, 1/3 to 1/2 as wide. Hds. large, with 20 to 30 violet-colored rays. Pappus tawny. Aug. - Nov. - Variable. (A. amplexcaulis Willd.)

. PHLOGIFOLIUS. Simple or racemous-paniculate; lvs. lance-ovate, cordale-auriculate, very acute, edges ciliate; hds. large, spreading 1G". Pappus deeply tawny. - N. Y. to Ohio.

16 A. Novas Augliae L. Hds. terminal, crowded,somewhat fastigiate; st. hispid, paniculate; lvs. linear-lanceolate, amplexicaul, auriculate at base; scales equal lax, linear-lanceolate, rather longer than the disk, green tlieir whole length. - A largo 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.†

17 A. amethystinus Nutt. ? Clothed with a minute hoary tomentum ; st racemous paniculate; lvs. linear-lanceolate, entire, rough, acute, with somewhat auriculate appendages at the clasping base; iuvol. broad-bell-shaped; scales hispid-pubescent, imbricated, erect, with acute squarrous, green tips; ach. silky - Moist soils, Ms. (Dr. Robbins, etc.) to I11. (Mr. J. Wolf.) Hds. with showy blue rays, expending 1'. Differs from Nuttall's descr. in its scales which are not of equal length. Sept.

18 A. puiriceus L. St. hispid, paniculate; lvs. amplexicaul and more or less auriculate at base, appressed serrate, roughish above; invol. loose, longer than the disk, the scales linear-lanceolate, long and revolule, nearly equal and 2-rowed. - A large, handsome aster, common in swamps and ditches sometimes in dry soils, N. States and Can. St. 4 to 6f high, generally red (at least on the South side), furrowed, hispid. Lvs. rough-edged and rough beneath, acuminate, and some narrowed at base. Rays 30 - 60, long (5") narrow, pale-purple, showy. Aug. - Sept.

. viminkus. Tall, slender, smoothisli; has. few, very large; lvs. narrow. y. FIRMUS. Low (2 - 3f.) scabrous, stout; lvs. thick, subentire. Hds. many. 6. glaber. Low (2f.) simple, smoothisli; lvs. narrow, erect, entire; sc. loose but not recurved ; rays large, 20 - 30, pale. Swampy thickets, I11. (J. Wolf.) e. candidus. Ihe common form (a) with while rays. N. Y. (Mr. Hankenson.)

19 A. prenanthoides Muhl. St. hairy or pubescent above, corymbous-panicu-late; lvs. oval-lanceolate, serrate, acuminate, attenuate at base into a long winged petiole which is auriculate at the insertion; invol. imbricated with several rows of linear, green-tipped, spreading scales. - Grows in low woods, N. Y. to Ky. Stem 2 - 3f high, with a terminal, corymbous panicle of largo heads on short peduncles. Rays showy, pale blue. Leaves with the petiole 5 to 10' long. Branch leaves smaller, nearly entire. Sept. - Nov.

20 A. laevia L. Very smooth; st. angular; branches simple, 1-flowered; lvs. half-clasping, oblong, entire, shining, radical subserrate, lanceolate, upper auri-cled at base; iuvol. closely imbricate, the scales broadly linear, rigid, thickened and herbaceous at the apex; ach. glabrous. - A very smooth and beautiful species, 2 to 3f high, growing in low grounds. St. polished, green, often somewhat glaucous; lvs. rather fleshy, the lowest tapering to a winged petiole. Fls. large and showy, with numerous rays of a fin blue becoming purple. Sept. - Nov. (A. mutabilis L. A. amplexicaulis Muhl.)

. Laevigatus. Lvs. long, linear-lanceolate. (A. laevigatus Willd.) y. cyaneus. St. and lvs. conspicuously glaucous. (A. cyaneus Ph.) Beautiful varieties, especially the latter.

21 A. concinnus Willd. not of Nees. St. simple, paniculate or racemous, pubescent; lvs. 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. States. A slender species 1 to 2f high. Branches of the panicle rather short and remote. Lvs. 3 to 5' long, acuminate, varying from 1/2 to 1', in width, smooth except, the midvein beneath, branch lvs. few and much smaller. Hds. middle size, with 10 to 15 bluish-purple rays. Sept. - Nov.