Annual Bluegrass, Annual Blue Grass: Poa annua (Synonyms: Poa annua var. aquatica, Poa annua var. reptans) -
Bolander's Bluegrass, Bolander's Blue Grass: Poa bolanderi (Synonyms: Poa bolanderi ssp. bolanderi, Poa horneri) - Found west of the Cascade Mountains only in the Siskiyou Mountains of southwest Oregon.
Bulbous Bluegrass, Bulbous Blue Grass: Poa bulbosa ssp. vivipara (Synonyms: Poa bulbosa, Poa bulbosa ssp. bulbosa) -
Canada Bluegrass, Flat-stem Bluegrass, Flat-stem Blue Grass: Poa compressa -
Beach Bluegrass, Coastline Bluegrass, Coastline Blue Grass: Poa confinis -
Cusick's Bluegrass: Poa cusickii ssp. cusickii (Synonyms: Poa cusickii var. cusickii, Poa filifolia, Poa hansenii) - Only west of the Cascades in the Olympic Mountains?
Skyline Bluegrass: Poa cusickii ssp. epilis (Synonyms: Poa cusickii var. epilis, Poa epilis)
Cusick's Bluegrass, Purple Cusick's Bluegrass: Poa cusickii ssp. purpurascens (Synonym: Poa cusickii var. purpurascens) -
Timberline Bluegrass: Poa glauca ssp. rupicola (Synonyms: Poa glauca var. rupicola, Poa rupicola)
Howell's Bluegrass: Poa howellii (Synonyms: Poa bolanderi ssp. howellii, Poa bolanderi var. howellii) -
Weak Bluegrass: Poa infirma -
Looseflower Bluegrass, Loose-flower Bluegrass, Loose-flower Blue Grass, Loose-flowered Bluegrass: Poa laxiflora -
Bog Bluegrass, Marsh Blue Grass: Poa leptocoma (Synonyms: Poa leptocoma ssp. leptocoma, Poa leptocoma var. leptocoma, Poa vaseyochloa)
Large-flowered Sanddune Bluegrass, Seashore Bluegrass, Sand-dune Bluegrass, Sand-dune Blue Grass: Poa macrantha (Synonyms: Poa douglasii ssp. macrantha, Poa douglasii var. macrantha) -
Weeping Bluegrass, Withered Bluegrass, Withered Blue Grass: Poa marcida (Synonym: Poa saltuensis var. marcida) -
Wood Bluegrass, Woodland Bluegrass: Poa nemoralis
Hooker's Blue Grass, Veiny Bluegrass, Wheeler's Bluegrass: Poa nervosa (Synonyms: Poa nervosa var. nervosa, Poa vaseyana) -
Hybrid Bluegrass: Poa nervosa x secunda (Synonyms: Poa gracillima var. multnomae, Poa multnomae, Poa x multnomae, Poa nervosa x Poa secunda) -
Fowl Bluegrass, Fowl Blue Grass: Poa palustris (Synonyms: Poa crocata, Poa eyerdamii, Poa glauca var. crocata, Poa triflora) -
Alaska Blue Grass: Poa paucispicula (Synonyms: Poa leptocoma ssp. paucispicula, Poa leptocoma var. paucispicula, Poa merrilliana)
Piper's Bluegrass: Poa piperi -
Dryland Kentucky Bluegrass: Poa pratensis ssp. irrigata
Kentucky Bluegrass, Kentucky Blue Grass: Poa pratensis ssp. pratensis (Synonyms: Poa pratensis ssp. latifolia, Poa pratensis var. domestica, Poa pratensis var. lantha) -
Pringle's Bluegrass: Poa pringlei -
Rhizome Bluegrass, Siskiyou Bluegrass, Timber Bluegrass: Poa rhizomata -
Alkali Bluegrass, Big Bluegrass, Nevada Bluegrass: Poa secunda ssp. juncifolia (Synonyms: Poa ampla, Poa brachyglossa, Poa confusa, Poa juncifolia, Poa juncifolia ssp. porteri, Poa juncifolia var. ampla, Poa nevadensis, Poa nevadensis var. juncifolia) -
Bib Bluegrass, Canby's Bluegrass, Curly Bluegrass, Curly Blue Grass, One-sided Bluegrass, Pacific Bluegrass, Pine Bluegrass, Sandberg Bluegrass, Sandberg's Bluegrass: Poa secunda ssp. secunda (Synonyms: Poa buckleyana, Poa buckleyana var. sandbergii, Poa canbyi, Poa gracillima, Poa gracillima var. gracillima, Poa incurva, Poa laevigata, Poa orcuttiana, Poa sandbergii, Poa scabrella, Poa secunda var. elongata, Poa secunda var. incurva, Poa secunda var. stenophylla, Poa stenantha var. sandbergii) -
Nevada Bluegrass: Poa secunda (Synonym: Poa nevadensis, Poa secunda ssp. juncifolia) -
Narrow-flower Bluegrass, Narrow-flower Blue Grass, Northern Bluegrass, Trinius Bluegrass: Poa stenantha var. stenantha -
Suksdorf's Bluegrass, Western Bluegrass Western Blue Grass: Poa suksdorfii - Found west of the Cascade Mountains only in the Siskiyou Mountains of southwestern Oregon.
Rough Bluegrass, Roughstalk Bluegrass, Rough-stalk Blue Grass: Poa trivialis -
Ocean Bluff Grass, San Francisco Bluegrass, San Francisco Blue Grass, Seacliff Bluegrass: Poa unilateralis ssp. pachypholis - (Synonym: Poa pachypholis)
Ocean Bluff Bluegrass, San Francisco Bluegrass: Poa unilateralis ssp. unilateralis -
Wheeler's Bluegrass, Wheeler's Blue Grass: Poa wheeleri (Synonyms: Poa curta, Poa nervosa var. wheeleri) -