Cyanea grimesiana ssp. grimesiana, a member of the bellflower family (Campanulaceae), is a shrub 1 to 3.2 m (3.3 to 10.5 ft) tall. The leaves are pinnately divided, with 9 to 12 segments per side. The leaf blades are 27 to 58 cm (10.6 to 22.9 in) long and 14 to 32 cm (5.5 to 12.6 in) wide (across the segments). The inflorescence comprises 6 to 12 flowers. The calyx lobes, 10 to 44 mm (0.4 to 2 in) long and 4 to 14 mm (0.2 to 0.55 in) wide, are egg-shaped to lance-shaped and overlap at the base. The petals are purplish or greenish to yellowish white, often suffused or striped with magenta, and 55 to 80 mm (2 to 3 in) long. The orange berries are 18 to 30 mm (0.7 to 1.2 in) long.