Spiraea × arguta
sp-i-REE-a X ar-GU-ta
Native to (or naturalized in) Oregon:
- Deciduous shrub, 5-6 ft (1.5-1.8 m); spreading, arching. Leaves alternate, simple, 2-3 cm long, narrow (6-12 mm wide), serrations lacking or only above the middle of the leaf, light green. Flowers single, white, often distributed all the way to the end of unbranched, arching shoots.
- Note spelling difference: the genus is Spiraea; the common name is Spirea.
- Sun to light shade
- Hardy to USDA Zone 4 A cross between S. multiflora and S. thunbergii. Not easy to distinguish S. × arguta from S. thunbergii. However, when in bloom, S. × arguta has much longer unbranched shoots than S. thunbergii. This difference can still be observed as flowering ends and shoot growth begins.
- Oregon State Univ. campus: along southern end of parking lot west of Nash.