Booth's Willow: Salix boothii (Synonyms: Salix myrtillifolia, Salix novae-angliae, Salix pseudocordata, Salix pseudomyrsinites)

What appears to be Booth's willow as seen in wet meadows along the climber's trail near the head of Hellroaring Canyon, Mt. Adams, Yakama Nation lands.........September 2, 2017. Note the green, glabrous leaf undersides. If I've identified this correctly, this would be a new species for the Mt. Adams list.