Curved Woodrush: Luzula arcuata ssp. unalaschcensis
Field Woodrush, Sweep's Brush: Luzula campestris (Synonyms: Juncus campestris, Luzula campestris ssp. campestris) - This is evidently the introduced european species of woodrush which is similar in appearance to common woodrush (Luzula multiflora) but is rhizomatous.
Cascades Woodrush: Luzula cascadensis (Synonym: Luzula multiflora)
Pale Woodrush: Luzula comosa var. comosa (Synonyms: Luzula campestris var. congesta, Luzula congesta, Luzula multiflora ssp. congesta, Luzula multiflora var. comosa, Luzula multiflora var. congesta)
Pacific Woodrush: Luzula comosa var. laxa
Hitchcock's Woodrush, Smooth Woodrush: Luzula hitchcockii (Synonyms: Luzula glabrata, Luzula glabrata var. hitchcockii)
Common Woodrush: Luzula multiflora ssp. multiflora (Synonyms: Juncus campestris, Luzula campestris, Luzula campestris var. congesta, Luzula campestris var. frigida, Luzula campestris var. multiflora, Luzula congesta, Luzula multiflora var. congesta, Luzula multiflora ssp. congesta, Luzula multiflora ssp. frigida, Luzula multiflora var. multiflora, Luzula subcongesta)
Alpine Woodrush, Sierra Woodrush: Luzula orestera
Small-flowered Woodrush: Luzula parviflora (Synonyms: Juncus parviflorus, Luzula divaricata, Luzula fastigiata, Luzula parviflora ssp. fastigiata, Luzula parviflora var. melanocarpa, Luzula parviflora ssp. melanocarpa, Luzula parviflora ssp. parviflora, Luzula parviflora var. parviflora)
Piper's Woodrush: Luzula piperi (Synonym: Luzula wahlenbergii)
Spiked Woodrush: Luzula spicata (Synonym: Juncus spicatus)