tokens: It is associated with plant species such as oceanspray ( `` Holodiscus discolor `` ) , common snowberry ( `` Symphoricarpos albus `` ) , mountain snowberry ( `` S. oreophilus `` ) , white spirea ( `` Spiraea betulifolia `` ) , serviceberry ( `` Amelanchier alnifolia `` ) , Oregon-grape ( `` Mahonia repens `` ) , and pinegrass