BC Conservation Data Centre: Conservation Status Report
Allium crenulatum
Olympic onion
| Scientific Name: | Allium crenulatum |
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| English Name: | Olympic onion |
| Provincial Status Summary | |
| Status: | S3S4 |
| Date Status Assigned: | April 29, 2022 |
| Date Last Reviewed: | April 29, 2022 |
| Reasons: | There are currently 17+ known occurrences of Allium crenulatum in British Columbia, 16 of which are considered extant. The range extent is 1,479 square kilometres and the area of occupancy is 64 square kilometres with additional occurrences likely. |
| Range | |
| Range Extent: | D = 1,000-5,000 square km |
| Range Extent Comments: | The range extent for Allium crenulatum, calculated using a convex hull, is 1,479 square kilometres; on Vancouver Island from Empress Mountain north to Mt. Drabble. |
| Area of Occupancy (km2): | DE = 6-125 |
| Area of Occupancy Comments: | The area of occupancy, using a 2km x 2km grid cell for extant occurrences, is over 64 square kilometres. |
| Occurrences & Population | |
| Number of Occurrences: | BC = 6 - 80 |
| Comments: | There are currently 17+ known occurrences of Allium crenulatum in British Columbia, 16 of which are considered extant. |
| Number of Occurrences with Good Viability / Ecological Integrity: | D = 13 - 40 |
| Number of Occurrences Appropriately Protected & Managed: | Rank Factor not assessed |
| Population Size: | DE = 1,000 - 10,000 individuals |
| Comments: | The number of plants has not been reported at all sites, but one site has at least 1000 individuals and several others have one to two hundred plants. |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | D = Low |
| Comments: | Threats are low in the remote locations and rocky alpine meadow habitat. |
| Trend (in population, range, area occupied, and/or condition of occurrences) | |
| Short-Term Trend: | Rank Factor not assessed |
| Long-Term Trend: | Rank Factor not assessed |
| Other Factors | |
| Intrinsic Vulnerability: | Rank Factor not assessed |
| Environmental Specificity: | Rank Factor not assessed |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | R. Batten |
| Date: | May 12, 2021 |
| References | |
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Batten, R. 2018. Vascular plant GeoCAT range extent and index of AOO maps supporting status assessment 2017_18 for British Columbia Conservation Data Centre. March 2018. Victoria, BC. 450 pp.
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British Columbia Conservation Data Centre. Botany Program. 2000. Database containing records of rare plant collections and observations in the province of British Columbia.
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Please visit the website Conservation Status Ranks for information on how the CDC determines conservation status ranks. For global conservation status reports and ranks, please visit the NatureServe website http://www.natureserve.org/.
Suggested Citation:
B.C. Conservation Data Centre. 2021. Conservation Status Report: Allium crenulatum. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 6, 2026).