16. Aster Shortii Hook. Short's Aster

Fig. 4297

Aster Shortii Hook. Fl. Bor. Am. 2: 9. 1834.

Stem roughish or smooth, slender, panicu-lately branched above, 2°-4° high. Leaves thick, glabrous or nearly so above, finely and sparingly pubescent beneath, the lower and basal ones ovate or ovate-lanceolate, cordate at the base, acute or acuminate at the apex, slightly dentate, or entire, 2'-6' long, 1'-2' wide, borne on slender naked petioles; upper leaves lanceolate, entire, sessile or short-peti-oled, not cordate, those of the branches small and bract-like; heads numerous, 5"-7" high; involucre broadly campanulate, its bracts linear, acute, puberulent, imbricated in several series, their green tips appressed; rays 10-15, linear, violet-blue, 5"-6" long; pappus tawny.

On banks and along edges of woods, western Pennsylvania to Virginia, Georgia, Illinois, Wisconsin and Tennessee. Sept.-Oct.

17. Aster Azureus Lindl. Sky-Blue Aster

Fig. 4298

Aster azureus Lindl.; Hook. Comp. Bot. Mag. 1:

98. 1835 A. capillaceus Burgess; Small, Fl. S.E. U. S. 1215. 1903.

Stem slender, stiff, rough, branched above, 1°-4° high. Leaves thick, usually all entire, scabrous on both sides, the lower and basal ones cordate, ovate, ovate-lanceolate, or lanceolate, acute, acuminate, or obtusish, 2'-6' long, with slender, naked, often pubescent petioles; upper leaves short-petioled or sessile, lanceolate or linear, those of the branches reduced to small appressed bracts; heads numerous, 4"-5" high; involucre turbinate, its bracts glabrous, linear-oblong, abruptly acute, imbricated in several series, their green tips appressed; rays 10-20, bright blue, 3"-4" long; pappus tawny.

On prairies and along borders of woods, Ontario and western New York to Georgia, Minnesota, Kansas, Alabama and Texas. Aug.-Oct.

17 Aster Azureus Lindl Sky Blue Aster 96917 Aster Azureus Lindl Sky Blue Aster 970

18. Aster Cordifolius L. Common Blue Wood Aster

Fig. 4299

Aster cordifolius L. Sp. Pl. 875. 1753. Aster choralis Steele, Contr. Nat. Herb. 10: 372. 1911.

Stem glabrous or nearly so, rarely pubescent, much branched, bushy, 1°-5° high. Leaves thin, rough, more or less pubescent with scattered hairs above and on the veins beneath, sharply serrate, acuminate, the lower and basal ones slender-petioled, broadly ovate-cordate, 2'-$' long, the upper short-petioled or sessile, ovate or lanceolate, smaller; petioles scarcely margined; heads usually very numerous, small, 2"-3" high, 6"-9" broad, handsome; involucre turbinate to cylindric, its bracts oblong-linear, obtuse or obtusish, green-tipped, appressed; rays 10-20, 3"-4" long, violet or blue, sometimes pale, rarely white.

Woods and thickets, Nova Scotia and New Brunswick to Ontario, Minnesota, Georgia and Missouri. Consists of many races, differing mainly in leaf-form and inflorescence. Sept.-Dec. Tongue. Bee-weed.