Ontario Weeds: Swamp smartweed
Excerpt from Publication 505, Ontario Weeds,
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Table of Contents
- Other Names
- General Description
- Flowers and Fruit
- Similar Species
- Related Links
Name: Swamp smartweed, Polygonum
Other Names: renouée écarlate, persicaire des marais
Family: Buckwheat Or Smartweed Family (Polygonaceae)
General Description: Perennial, reproducing by seed and by rhizomes that root abundantly from the nodes. Like Water smartweed, Swamp smartweed also occurs in two forms: terrestrial and aquatic. The two smartweeds are very similar and nearly impossible to distinguish from each other before flowering, except that Swamp smartweed never has a leaf-like flange at the top of its ocrea.
Swamp smartweed. Underground rhizome with 1 flowering shoot and 1 vegetative shoot.
Habitat: Like Water smartweed, Swamp smartweed is also a native plant and occurs in similar habitats throughout Ontario.
Similar Species: It is distinguished from the terrestrial form of Water smartweed by never having a leaf-like flange on its ocrea and from both terrestrial and aquatic forms of Water smartweed by its longer, thinner inflorescence. It is usually coarser than Water smartweed.
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