Buttonbush

Cephalanthus occidentalis 'Keystone' Rubiaceae

Growth habit

Shrub

Perennation

Perennial

Native distribution

New Brunsw. to FL, West to Southern MN, NE, OK, and Southern NM, AZ

Location

Peterson Oak Grove

Source of plant

Western Maine Nurseries

Description

Rounded, 3' to 6' tall, (occasionally 10' to 15' tall in the southern part of its range) of rather loose proportions. Flowers are creamy-white, crowded in globular heads, without the projecting styles, 1" to 1 1/5" across, on peduncles 1" to 1 2/5" long in August. Fruit a nutlet that remains present throughout the winter. A USDA seed strain harvested from parents over a wide geographic range with increased vigor and disease resistance.

USDA Hardiness Zone

5

Special characteristics

disease resistance