Sisyrinchium sarmentosum is a species of flowering plant in the iris family known by the common names mountain blue-eyed grass[2] and pale blue-eyed-grass.

It is native to the Pacific Northwest of North America, where it is known from a part of the Cascade Mountains in Washington and Oregon.

The meadows are surrounded by conifers and meadow species may include Deschampsia cespitosa, Alopecurus pratensis, Phleum pratense, Poa palustris, Juncus tenuis, Juncus ensifolius, Carex vesicaria, Carex microptera, Agrostis idahoensis, Fragaria virginiana var.

platypetala, Prunella vulgaris, Trifolium repens, Potentilla drummondii, Ranunculus flammula, Solidago canadensis, Veronica scutellata, Botrychium multifidum, Antennaria microphylla and Viola adunca.

When the natural fire regime is prevented, large and woody vegetation encroaches on the plant's meadow habitat, producing competition and shade.