Aquilegia formosa, also known as the red columbine, western columbine, or the Sitka columbine, is a flowering plant in the Ranunculaceae family.
- Aquilegia canadensis L. var. formosa
- Aquilegia columbiana Rydb.
- Aquilegia formosa Fisch. ex DC. in part [H&C, KZ99]
- Aquilegia formosa Fischer ex de Candolle var. communis B. Boivin
- Aquilegia formosa Fischer ex de Candolle var. megalantha B. Boivin
- Aquilegia formosa Fischer var. wawawensis (Payson) H. St. John 
- Kingdom Plantae – Plants
- Subkingdom Tracheobionta – Vascular plants
- Superdivision Spermatophyta – Seed plants
- Division Magnoliophyta – Flowering plants
- Class Magnoliopsida – Dicotyledons
- Subclass - Magnoliidae
- Order Ranunculales
- Family Ranunculaceae – Buttercup family
- Genus Aquilegia L. – columbine
- Species Aquilegia formosa Fisch. ex DC. – western columbine
Densely pubescent perennial from a branched to simple woody base with several stems 1.5-10 dm. tall. Long petiolate, mostly basal leaves 1.5-5.5 cm long. Pale to deep red flowers usually several, nodding; sepals 5, petal-like, oblong-lanceolate, 1.5-2.5 cm. long; petals 5, yellow, with straight spurs 10-15 mm. long, the blades 2-5 mm. long; stamens numerous, the inner ones sterile and scale-like. Follicles 5, 2 cm. long, copiously glandular-puberulent. 
Widely distributed throughout Washington; Alaska south to California, coastal and inland to Alberta and Wyoming. 
Open woods, lowlands to mid-elevations in the mountains. 
Seed sample from: 2011
Average Measurement: 2.5 x 1.4 x 1.2
Measurement Range: L: 2.5 - 2.75, W: 1.2 - 1.5, D: 1 - 1.5
Shape: Seeds tapering at hilum end, broadening at opposite side.
Color: Hilum is white, seed is black.
Surface: At least one distinct ridge runs from the hilum to the opposite side. End opposite hilum is sometimes puckered or having concave pits. Seed is glossy and lightly textured with very small bumps.
Basic Explanations and Assumptions:
The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.
Measurements included are the mean average for each measurement of ten separate seeds.
All measurements in millimeters unless otherwise noted.