Stems tall and rather stiff, hairy and rough to the touch, 3 to 12 feet high, often purplish, perennial by fleshy roots and creeping rootstocks. Leaves sessile or short petioled, firm, lanceolate, very rough above, margins serrate, long pointed at the apex, narrowed at the base, opposite or alternate, 2 to 6 inches long, one-half to 1 inch wide. Heads of flowers on long peduncles, 11/2 to 21/2 inches broad. Ray flowers ten to twenty in number, surrounding the yellow or yellowish brown disk. Bracts of the involucres lanceolate, ciliate, with slender, spreading tips. Receptacle chaffy, the chaff oblong-linear and pointed.

In swamps and wet meadows, Maine to Ontario and Saskatchewan, south to Florida, Louisiana and Colorado. Especially abundant in swamps and marshes along the coast. Flowering from August to October.

Memoir 15 N. Y. State Museum

Plate 256

Tall, Giant Or Wild Sunflower   Helianthus giganteus

Tall, Giant Or Wild Sunflower - Helianthus giganteus