Betula ×eastwoodiae Sarg.

Montana: Gallatin County: Gallatin Range: Gallatin National Forest: along Porcupine Creek from trailhead ro 3/4 air mi ESE, ca 3-3.5 air mi SSE of intersection of U.S. Hwy 191 and Mont Hwy 64 (Big Sky), ca 33 air mi SSW of Bozeman. Elev. 6120-6320 ft.
45.2234° N, 111.242° W to 45.2203° N, 111.2269° W; NAD 83, , GPS Reading; T7S R4E S15 SW1/4; also South1/2 S16
Datum: NAD 83. Coordinate Source: GPS Reading.
Stream bottom meadows and banks with spruce and lodgepole pine. Phenology: Vegetative.

B. E. Nelson 73332, Jul 28, 2007
USFS, Accession: 868083, Barcode: USFS0062346