Pacific Woodrush: Luzula comosa var. laxa - Inflorescence open, umbellate, consisting of cylindrical or oblong spikes of clustered flowers. Tepals light to medium brown.
Common Woodrush, Field Woodrush, Pacific Woodrush, Heath Woodrush: Luzula multiflora (Synonyms: Luzula campestris ssp. campestris, Luzula campestris ssp. nevadensis, Luzula campestris var. congesta, Luzula campestris var. frigida, Luzula campestris var. multiflora, Luzula comosa, Luzula comosa var. congesta, Luzula congesta, Luzula multiflora, Luzula multiflora ssp. congesta, Luzula multiflora ssp. frigida, Luzula multiflora ssp. multiflora, Luzula multiflora var. comosa, Luzula multiflora var. congesta, Luzula multiflora var. multiflora, Luzula subcongesta) - Inflorescence open, umbellate, consisting of cylindrical or oblong spikes of clustered flowers. Tepals medium to dark brown or blackish.
Smooth Woodrush: Luzula hitchcockii (Synonyms: Luzula glabrata, Luzula glabrata var. hitchcockii) - Inflorescence an open panicle of single flowers.
Large-anthered Woodrush, Prairie Woodrush: Luzula macrantha (Synonyms: Juncoides comosa var. macrantha, Luzula campestris var. macrantha, Luzula comosa var. macrantha) - Inflorescence open, umbellate, consisting of cylindrical or oblong spikes of clustered flowers. Tepals medium to dark brown. Anthers and style long, up to 2.2 mm for the former and 3 mm for the latter.
Smallflowered Woodrush: Luzula parviflora (Synonyms: Luzula divaricata, Luzula fastigiata, Luzula parviflora ssp. fastigiata, Luzula parviflora var. melanocarpa, Luzula parviflora ssp. melanocarpa, Luzula parviflora ssp. parviflora, Luzula parviflora var. parviflora) - Inflorescence an open panicle with single flowers, the branches either spreading or often drooping.
Prairie Woodrush: Luzula subsessilis - Flowers in clustered spikes forming a single head (not umbellate). Tepals dark brown or blackish.