North America Non-native Plant

Polygonum Polycnemoides Var. Oliveri

Botanical name: Polygonum polycnemoides var. oliveri

USDA symbol: POPOO3

Native status: Not native but doesn't reproduce and persist in the wild

The Mystery of Polygonum polycnemoides var. oliveri: A Gardener’s Detective Story Sometimes in the world of native gardening, we encounter plant names that send us down rabbit holes of botanical mystery. Polygonum polycnemoides var. oliveri is one such enigma – a plant variety that seems to exist more in taxonomic ...

The Mystery of Polygonum polycnemoides var. oliveri: A Gardener’s Detective Story

Sometimes in the world of native gardening, we encounter plant names that send us down rabbit holes of botanical mystery. Polygonum polycnemoides var. oliveri is one such enigma – a plant variety that seems to exist more in taxonomic limbo than in actual gardens.

What’s in a Name? The Taxonomic Puzzle

Here’s where things get interesting (and a bit frustrating): reliable information about Polygonum polycnemoides var. oliveri is virtually nonexistent in current botanical literature. This could mean several things – the variety may be extremely rare, the name might be outdated, or it could be a taxonomic designation that’s fallen out of use.

The genus Polygonum has been through major reshuffling over the past few decades. Many plants that were once called Polygonum have been moved to other genera like Persicaria, Fallopia, and Reynoutria. It’s entirely possible that what was once known as Polygonum polycnemoides var. oliveri now goes by a completely different name.

Should You Try to Grow This Mystery Plant?

Given the lack of available information, growing this particular variety presents some challenges:

  • No reliable source for seeds or plants
  • Unknown growing requirements
  • Unclear native status and geographic distribution
  • No information about potential benefits to wildlife or pollinators

Without basic information about native range, growing conditions, or even confirmation that this variety is currently recognized, it’s difficult to recommend seeking it out for your garden.

Better Alternatives in the Knotweed Family

If you’re interested in plants related to the Polygonum family, consider these well-documented alternatives:

  • Pennsylvania Smartweed (Persicaria pensylvanica): A native annual with pink flower spikes that attracts butterflies and birds
  • Water Smartweed (Persicaria amphibia): Great for pond edges and wet areas
  • Mild Water Pepper (Persicaria hydropiperoides): A native perennial perfect for rain gardens

The Takeaway for Native Plant Enthusiasts

While the mystery of Polygonum polycnemoides var. oliveri remains unsolved, this serves as a good reminder to work with reputable native plant societies and nurseries when seeking specific varieties. They can help you navigate taxonomic changes and find plants that will actually thrive in your garden.

Sometimes the most rewarding gardening adventures come from discovering well-documented native plants that are readily available and eager to flourish in your landscape. Save the botanical detective work for rainy day research, and focus your planting energy on natives with proven track records!

Polygonum Polycnemoides Var. Oliveri

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Polygonum L. - knotweed

Species

Polygonum polycnemoides Jaubert & Spach - manyleg knotweed

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA