PLANT: Lenticels pale, orbicular to linear, on stems of all sizes; winter buds 4-7 mm long, on stalks 1-3 mm long; scales 2. LEAVES: blade thin and papery; surfaces abaxially glabrous to sparsely pubescent, slightly to imperceptibly resin-coated. NOTES: In mountains usually along streams or in other wet places: Apache, Coconino, Gila, Graham, Greenlee, Navajo, Pima, Yavapai cos.; 1900-3000 m (6300-9000 ft); early spring; w U.S.; w Can. Used medicinally by Native Americans for various afflictions. REFERENCES: Brasher, Jeffrey W. 2001. Betulaceae. J. Ariz. – Nev. Acad. Sci. Volume 33(1)