A slender perennial with erect stems, 2 to 7 feet high from perennial roots and rootstocks; smooth nearly to the summit. Leaves rough on the upper surface, lanceolate or ovate-lanceolate in shape, tapering at the apex to a long point, 3 to 8 inches long, one-fourth to one-half of an inch wide, toothed, sessile and usually opposite, spreading at right angles from the stem. Heads of flowers yellow, about 2 inches broad; bracts of the involucres ovate-lanceolate or lanceolate, the outer ones spreading.

In dry woodlands, thickets and roadsides, Maine and Ontario to Manitoba, south to Florida, Louisiana and Nebraska. Flowering from July to September.

Memoir 15 N. Y. State Museum

Plate 257

Rough Or Woodland Sunflower - Helianthus divaricatus