Helianthus debilis subsp. tardiflorus

Stems erect, glabrous or sparsely hispid. Leaf blades 5-9(-10) cm , margins usually deeply, irregularly serrate, abaxial faces densely gland-dotted. Peduncles 10-25 cm. Ray laminae 14-16(-20) mm. Discs 14-15 mm diam. 2n = 34.

Flowering spring-fall. Sandy beaches; 0-30+ m; Ala., Fla., Ga., Miss.