Fendler's Meadowrue, Fendler's Meadow-rue: Thalictrum fendleri (Synonym: Thalictrum fendleri var. platycarpum) - Flowers imperfect, having only stamens or pistils present, not both. Anthers shorter than filaments. Achenes erect and 4-6 mm long.
Western Meadowrue, Western Meadow-rue, Western Meadow Rue: Thalictrum occidentale - (Synoyms: Thalictrum breitungii, Thalictrum occidentale var. macounii, Thalictrum occidentale var. megacarpum, Thalictrum occidentale, var. occidentale, Thalictrum occidentale var. palousense) - Flowers imperfect, having only stamens or pistils present, not both. Anthers shorter than filaments. Achenes 6-8 mm long, spreading or reflexed downward.
Tall Western Meadowrue, Many-fruited Meadowrue: Thalictrum polycarpum (Synonym: Thalictrum fendleri var. polycarpum) -
Fewflower Meadow-rue, Few-flowered Meadowrue, Mountain Meadowrue: Thalictrum sparsiflorum (Synonyms: Thalictrum sparsiflorum var. nevadense, Thalictrum sparsiflorum var. saximontanum) - Flowers have both male stamens and pistils present in each flower. Anthers about one-half as long as filaments.
Veiny Meadowrue, Early Meadowrue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri) - Flowers imperfect, having only stamens or pistils present, not both. Anthers longer than filaments. Achenes 4-5 mm long, ascending or erect.