Tall or Giant Sunflower
Tall or Giant Sunflower
Helianthus giganteus
Flower-heads–Several, on long, rough-hairy peduncles; 1-1/2 to 2-1/4 in. broad; 10 to 20 pale yellow neutral rays around a yellowish disk whose florets are perfect, fertile. Stem: 3 to 12 ft. tall, bristly-hairy, usually branching above, often reddish; from a perennial, fleshy root. Leaves: Rough, firm, lance-shaped, saw-toothed, sessile. [...]











