American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus) -
Meadow Lotus, River-bar Bird's-foot Trefoil: Acmispon denticulatus (Synonyms: Hosackia denticulata, Lotus denticulatus) -
Nevada Deervetch, Nevada Bird's-foot Trefoil: Acmispon nevadensis var. nevadensis (Synonyms: Hosackia decumbens, Lotus douglasii, Lotus nevadensis var. douglasii, Lotus nevadensis var. nevadensis) -
Field Lotus, Small-flowered Deervetch, Desert Deervetch, Short-flower Bird's-foot Trefoil: Acmispon parviflorus (Synonyms: Hosackia parviflora, Lotus micranthus, Lotus parviflorus) -
Hairy Lotus: Acmispon wrangelianus (Synonym: Lotus subpinnatus, Lotus wrangelianus) -
Big Deervetch, Thicket Deervetch: Hosackia crassifolia var. crassifolia (Synonym: Hosackia crassifolia, Lotus crassifolius var. crassifolius) -
Seaside Bird's-foot Trefoil, Seaside Lotus: Hosackia gracilis (Synonym: Lotus formosissimus) - Sample collected on east slope of the Mt. Hood NF
Streambank Birdsfoot Trefoil: Hosackia oblongifolia var. oblongifolia (Synonyms: Hosackia torreyi, Lotus oblongifolius var. nevadensis, Lotus oblongifolius var. oblongifolius, Lotus torreyi) -
Bog Deervetch, Meadow Bird's-foot Trefoil, Meadow Deervetch: Hosackia pinnata (Synonyms: Lotus bicolor, Lotus pinnatus) -
Rosy Birdsfoot Trefoil, Rosy Bird's-foot Trefoil: Hosackia rosea (Synonyms: Lotus aboriginus, Lotus crassifolius var. subglaber, Lotus stipularis var. subglaber) -
Birdsfoot Trefoil, Birdsfoot-trefoil, Garden Bird's-foot Trefoil, Birdfoot Deervetch: Lotus corniculatus (Synonyms: Lotus corniculatus var. arvensis, Lotus corniculatus var. corniculatus, Lotus tenuis) -
Narrow-leaved Trefoil: Lotus tenuis (Synonym: Lotus corniculatus var. tenuis) -
Big Lotus, Big Trefoil, Greater Bird's-foot Trefoil, Large Trefoil: Lotus uliginosus (Synonym: Lotus pedunculatus) -