Delphinium carolinianum Walter
Identification: Plants reach up to 3' (1 m) in height, with a single straight stem that is sometimes hairy. Leaves are somewhat palmlike in shape, much divided, about 3½" (9 cm) around. Leaflets may be very narrow and grasslike, or wider. Flower clusters up to 12" (30 cm) long form at the top, white to pale or bright blue. Each flower is on a small stalk ½" (1.5 cm) long, and has five petals and a long spur behind it. There is a fuzzy area in the center. Flowers are ⅜-¾" (1-2 cm) around, and the spur is about the same length as the flower diameter. They flower between May and June.
Delphinium carolinianum on Missouriplants.com
Delphinium carolinianum at the Lady Bird Johnson Wildflower Center
Delphinium carolinianum at Illinois Wildflowers
Delphinium carolinianum on Native Plants of Texas
Delphinium carolinianum on eFloras
Delphinium carolinianum at the University of Wisconsin's Robert W. Freckmann Herbarium
Delphinium carolinianum description by Thomas H. Kent, last updated 2 Jan 2019.