Yellow Columbine: Aquilegia flavescens (Synonyms: Aquilegia flavescens var. flavescens, Aquilegia flavescens var. miniata, Aquilegia formosa var. flavescens) - Flowers yellowish, occasionally with pinkish sepals. Leaves compound ternate, non-hairy. Flowers with five yellow spurs which are hooked.
Hybrid Columbine: Aquilegia flavescens x Aquilegia formosa
Red Columbine, Western Columbine, Sitka Columbine: Aquilegia formosa (Synonyms: Aquilegia formosa var. communis, Aquilegia formosa var. formosa, Aquilegia formosa var. fosteri, Aquilegia formosa var. hypolasia, Aquilegia formosa var. megalantha, Aquilegia formosa var. pauciflora, Aquilegia formosa var. truncata, Aquilegia formosa var. wawawensis) - Similar in appearance to yellow columbine, but the sepals and five spurs are red, while the central petals are yellow. The spurs are straight, not hooked. Leaves compound ternate.