Spiraea betulifolia Pall. ssp. corymbosa (Raf.) Roy L. Taylor & MacBryde
[= Spiraea betulifolia var. corymbosa]
Annotated by Grahm M Johnson, 5 Dec 2017. Sources: Flora of PNW.

Idaho: Valley County: Black Butte, 23 air miles E and 3 air miles N of Big Creek, Id., Frank Church River of No Return Wilderness, Krassel Ranger District, Payette National Forest. Granite peak within a ~20 year old fire scar, a mix of forest and scree fields in all directions.¶ Elev. 8387 ft.
45.184929° N, 114.847752° W
Datum: WGS 84. Coordinate Source: Digital Map.
Across W aspect, through scree fields, burn scars, and subalpine forest. ¶Dominant species: Pinus albicaulis, Abies lasiocarpa, Pinus contorta, Juniperus communis, Ribes montigenum, Vaccinium scoparium, and Chamerion angustifolium. Phenology: Flowers.

Grahm M Johnson 17-304, Aug 6, 2017
With Sebastian Mortimer, Ty Styhl
ID, Accession: 174870, Barcode: ID180310