BC Conservation Data Centre: Species Summary
Polygonum engelmannii
Engelmann's knotweed
| Scientific Name: | Polygonum engelmannii Greene | ||||||||||
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| Scientific Name Synonyms: |
Polygonum douglasii ssp. engelmannii
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| English Name: | Engelmann's knotweed | ||||||||||
| Classification / Taxonomy | |||||||||||
| Scientific Name - Concept Reference: | Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR. | ||||||||||
| Classification Level: | Species | ||||||||||
| Taxonomy Comments: | Formerly tracked as Polygonum douglasii ssp. engelmannii. Elevated to full species in Oct. 2006. | ||||||||||
| Species Group: | Vascular Plant | ||||||||||
| Species Code: | POLYENG | ||||||||||
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| Conservation Status / Legal Designation | |||||||||||
| Global Status: | G5T3T5 (Jan 2007) | ||||||||||
| Provincial Status: | S1 (Apr 2019) | ||||||||||
| BC List: | Red | ||||||||||
| Provincial FRPA list: | |||||||||||
| Provincial Wildlife Act: | |||||||||||
| COSEWIC Status: | |||||||||||
| SARA Schedule: | |||||||||||
| General Status Canada: | 3 - Sensitive (2010) | ||||||||||
| Ecology & Life History | |||||||||||
| General Description: | |||||||||||
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| Similar Species: | |||||||||||
| Habitats: (Type / Subtype / Dependence) |
Forest / Conifer Forest - Dry / Facultative - frequent use
Grassland/Shrub / Meadow / Unknown Rock/Sparsely Vegetated Rock / Rock/Sparsely Vegetated Rock / Facultative - frequent use |
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| Provincial Phenology: (1st half of month/ 2nd half of month) |
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| Elevation (m) (min / max): | Provincial: | ||||||||||
| Known Pests: | |||||||||||
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| Dispersal: | |||||||||||
| Provincial Inventory | |||||||||||
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| Ownership of occurrences (Known locations): | |||||||||||
| Inventory Need: | |||||||||||
| Economic Attributes | |||||||||||
| Distribution | |||||||||||
| Endemic: | N | ||||||||||
| Disjunct, more common elsewhere: | |||||||||||
| Peripheral, major distribution elsewhere: | |||||||||||
| Authors / Contributors | |||||||||||
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| Provincial Information Author: | |||||||||||
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| Last Literature Search: | |||||||||||
| References and Related Literature | |||||||||||
Douglas, G.W., D. Meidinger, and J. Penny. 2002. Rare Native Vascular Plants of British Columbia, 2nd ed. B.C. Conserv. Data Centre, Terrestrial Inf. Branch, Victoria. 358pp. |
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Douglas, G.W., D. Meidinger, and J. Pojar, eds. 1999. Illustrated Flora of British Columbia, Vol. 4, Dicotyledons (Orobanchaceae through Rubiaceae). B.C. Minist. Environ., Lands and Parks, and B.C. Minist. For., Victoria. 427pp. |
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Please visit the website Conservation Status Ranks for definitions of the data fields used in this summary report.
Suggested Citation:
B.C. Conservation Data Centre. Species Summary: Polygonum engelmannii. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 14, 2026).