|Aconitum columbianum in Mount Baker-Snoqualmie National Forest|
Aconitum columbianum is a species of flowering plant in the buttercup family known by the common names Columbian monkshood or western monkshood.
This wildflower is native to western North America where it grows in riparian and other moist areas, in meadows and coniferous forests.  It is found from 600–2,900 metres (2,000–9,500 ft) in elevation. 
Aconitum columbianum is a tall spindly erect to scandent forb which is perennial from rhizomes. It has lobed or toothed leaves and long stems with far-spaced flowers.
The folded, wrinkly flowers are often deep blue or purple, but may also be white or yellowish, and they usually have a spur. The fruits are pod-like follicles.
Like other monkshoods (Aconitum species), this plant is poisonous.
Subspecies and varieties include: 
- Aconitum columbianum ssp. columbianum 
- Aconitum columbianum var. howellii — Howell's monkshood 
- Aconitum columbianum ssp. viviparum 
- Jepson Manual Treatment of Aconitum columbianum
- USDA Plants Profile for Aconitum columbianum (Columbian monkshood)
- CalFlora Database: Aconitum columbianum
- Aconitum columbianum — U.C. Photo gallery
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