Florence Elizabeth Treadwell Boynton (December 25, 1876 – March 23, 1962) was an American educator, artist, designer, and social reformer.

She was "California's chief exponent of rhythmic gymnastics,"[1] and promoted "Open Air Motherhood", a parenting philosophy that maximized children's outdoor time.

[3] Florence Treadwell was raised in Oakland, where she and Isadora Duncan were close friends from girlhood.

"[12] Florence Treadwell was engaged to Augustin Duncan and William Randolph Hearst before she married attorney Charles Calvin Boynton.

[14] Her home and studio, the Temple of Wings, is listed in the California State Historic Resources Inventory, and in 1991 was designated City of Berkeley Landmark.