Spiraea ×sanssouciana K. Koch.

Oregon: Multnomah County: Portland. SE Madison Street and 58th Ave. Northeast corner. Elev. 200 ft.
45.513028° N, 122.60357° W,
Datum: WGS 84. Coordinate Source: Digital Map.
"Greenstreet" (vegetated stormwater catchment basin in street). Both Spiraea japonica and Spiraea douglasii are planted in these catchments. Appears to be spontaneous hybrid. Phenology: Flowers.

Dominic Maze 1108, Aug 7, 2019
HPSU, Accession: 21168