Peachleaf Willow, Peach-leaf Willow: Salix amygdaloides (Synonyms: Salix amygdaloides var. wrightii, Salix nigra var. amygdaloides, Salix nigra var. wrightii, Salix wrightii) -
Arctic Willow: Salix arctica (Salix arctica ssp. tortulosa, Salix arctica var. araioclada, Salix arctica var. kophophylla, Salix arctica var. tortulosa) -
Barclay's Willow: Salix barclayi (Synonyms: Salix barclayi var. angustifolia, Salix barclayi var. conjuncta, Salix barclayi var. latiuscula, Salix pyrolifolia var. hoyeriana) -
Bebb's Willow, Gray Willow Long-beak Willow: Salix bebbiana (Synonyms: Salix bebbiana var. capreifolia, Salix bebbiana var. depilis, Salix bebbiana var. luxurians, Salix bebbiana var. perrostrata, Salix bebbiana var. projecta) -
Booth's Willow: Salix boothii (Synonyms: Salix myrtillifolia, Salix novae-angliae, Salix pseudocordata, Salix pseudomyrsinites) -
Shortfruit Willow, Short-fuited Willow: Salix brachycarpa var. brachycarpa (Synonyms: Salix brachycarpa var. alticola, Salix brachycarpa var. antimima, Salix brachycarpa var. glabellicarpa, Salix brachycarpa var. sansonii, Salix chlorolepis var. antimima, Salix desertorum var. fruticulosa, Salix desertorum var. stricta) -
Cascade Willow: Salix cascadensis (Synonyms: Salix brownii var. tenera, Salix cascadensis var. thompsonii, Salix tenera) -
Undergreen Willow, Under-green Willow, Variable Willow: Salix commutata (Synonyms: Salix barclayi var. commutata, Salix commutata var. commutata, Salix commutata var. denudata, Salix commutata var. puberula) -
Eastwood's Willow, Mountain Willow, Sierra Willow, Sierran Willow: Salix eastwoodiae (Synonym: Salix californica) -
Columbia River Willow, Coyote Willow, Narrowleaf Willow: Salix exigua (Synonyms: Salix argophylla, Salix exigua var. angustissima, Salix exigua var. columbiana, Salix exigua var. exigua, Salix exigua var. hindsiana, Salix exigua var. luteosericea, Salix exigua var. nevadensis, Salix exigua var. stenophylla, Salix exigua var. virens, Salix parishiana) -
Geyer's Willow: Salix geyeriana (Synonyms: Salix geyeriana ssp. argentea, Salix geyeriana var. argentea, Salix geyeriana var. geyeriana, Salix geyeriana var. meleina, Salix meleina) -
Glaucous Willow, Shaggy Willow, Shaggy-leaf Willow: Salix glauca var. villosa (Synonym: Salix glauca ssp. glabrescens, Salix glauca var. glabrescens, Salix orestera, Salix pseudolapponum, Salix villosa, Salix wolfii var. pseudolapponum) -
Coastal Willow, Dune Willow, Hooker's Willow: Salix hookeriana (Synonyms: Salix amplifolia, Salix hookeriana var. laurifolia, Salix hookeriana var. tomentosa, Salix piperi) -
Caudate Willow, Shining Willow, Tail-leaf Willow, Whiplash Willow, Greenleaf Willow: Salix lasiandra var. caudata (Synonyms: Salix caudata, Salix caudata var. bryantiana, Salix caudata var. caudata, Salix caudata var. parvifolia, Salix lasiandra ssp. caudata, Salix lasiandra var. fendleriana, Salix lucida ssp. caudata) -
Pacific Willow, Red Willow: Salix lasiandra var. lasiandra (Synonyms: Salix lasiandra, Salix lasiandra var. abramsii, Salix lasiandra var. lancifolia, Salix lasiandra var. lyallii, Salix lasiandra var. macrophylla, Salix lasiandra var. recomponens, Salix lucida ssp. lasiandra) -
Arroyo Willow: Salix lasiolepis (Synonyms: Salix lasiolepis var. bakeri, Salix lasiolepis var. bigelovii, Salix lasiolepis var. lasiolepis) -
Lemmon's Willow: Salix lemmonii (Synonyms: Salix austinae, Salix lemmonii var. austinae, Salix lemmonii var. melanopsis, Salix lemmonii var. sphaerostachya) -
Strapleaf Willow: Salix liguifolia (Synonym: Salix lutea var. liguifolia) -
Columbia River Willow, Dusky Willow: Salix melanopsis (Synonyms: Salix exigua ssp. melanopsis, Salix exigua var. gracilipes, Salix exigua var. tenerrima, Salix melanopsis var. bolanderiana, Salix melanopsis var. tenerrima, Salix sessilifolia var. vancouverensis) -
One-color Willow: Salix monochroma (Synonym: Salix eriocephala var. monochroma, Salix rigida var. mackenzieana) -
Snow Willow: Salix nivalis (Synonyms: Salix nivalis var. saximontana, Salix reticulata ssp. nivalis, Salix reticulata var. nana, Salix reticulata var. nivalis, Salix reticulata var. saximontana, Salix saximontana) -
Bog Willow: Salix pedicellaris (Synonyms: Salix fuscescens var. hebecarpa, Salix hebecarpa, Salix myrtilloides var. hypoglauca, Salix myrtilloides var. pedicellaris, Salix pedicellaris var. hypoglauca, Salix pedicellaris var. tenuescens) -
Alpine Willow, Rock-loving Willow: Salix petrophila (Synonyms: Salix anglorum, Salix anglorum var. araioclada, Salix arctica ssp. petraea, Salix arctica var. caespitosa, Salix arctica var. graminifolia, Salix arctica var. petrophila, Salix brownei var. petraea, Salix caespitosa, Salix petrophila var. caespitosa) -
Diamondleaf Willow, Diamond-leaf Willow, Tea-leaf Willow, Tea-leaved Willow, Plane-leaf Willow: Salix planifolia (Synonyms: Salix monica, Salix pennata, Salix phylicifolia, Salix phylicifolia ssp. planifolia, Salix phylicifolia var. monica, Salix phylicifolia var. pennata, Salix phylicifolia var. planifolia, Salix planifolia var. monica, Salix planifolia var. nelsonii, Salix planifolia var. pennata, Salix planifolia var. planifolia) -
Mackenzie's Willow: Salix prolixa (Synonyms: Salix cordata var. mackenzieana, Salix eriocephala ssp. mackenzieana, Salix eriocephala var. mackenzieana, Salix mackenzieana, Salix mackenzieana var. mackenzieana, Salix mackenzieana var. macrogemma, Salix rigida ssp. mackenzieana, Salix rigida var. mackenzieana, Salix rigida var. macrogemma) -
False Mountain Willow: Salix pseudomonticola (Synonym: Salix barcalyi var. pseudomonticola)
Scouler's Willow: Salix scouleriana (Synonyms: Salix scouleriana var. brachystachys, Salix scouleriana var. coetaenea, Salix scouleriana var. crassijulis, Salix scouleriana var. flavescens, Salix scouleriana var. poikila, Salix scouleriana var. scouleriana, Salix scouleriana var. thompsonii, Salix stagnalis) -
Northwest Sandbar Willow, Sessile-leaf Willow, Soft-leaved Willow: Salix sessilifolia (Synonym: Salix exigua var. sessilifolia, Salix fluviatilis var. sessilifolia, Salix longifolia var. sessilifolia, Salix macrostachya, Salix macrostachya var. cusickii, Salix sessilifolia var. villosa) -
Sitka Willow: Salix sitchensis var. sitchensis (Synonyms: Salix coulteri, Salix cuneata, Salix sitchensis var. congesta, Salix sitchensis var. denudata, Salix sitchensis var. parviflora, Salix sitchensis var. ralphiana) -
Rock Willow: Salix vestita (Synonyms: Salix vestita ssp. leiolepis, Salix vestita var. erecta, Salix vestita var. humilior) -