North America Non-native Plant

Lotus Purpureus

Botanical name: Lotus purpureus

USDA symbol: LOPU7

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

Lotus purpureus: The Mysterious Member of the Lotus Family If you’ve stumbled upon the botanical name Lotus purpureus in your gardening research, you might be scratching your head wondering what exactly this plant is all about. You’re not alone! This particular species is something of an enigma in the gardening ...

Lotus purpureus: The Mysterious Member of the Lotus Family

If you’ve stumbled upon the botanical name Lotus purpureus in your gardening research, you might be scratching your head wondering what exactly this plant is all about. You’re not alone! This particular species is something of an enigma in the gardening world, with limited information readily available to help gardeners make informed decisions.

What We Know (And Don’t Know) About Lotus purpureus

Lotus purpureus belongs to the broader Lotus genus, which includes many leguminous plants known for their nitrogen-fixing abilities and often attractive flowers. However, specific details about this particular species are surprisingly scarce in mainstream horticultural literature.

The name suggests it may have purple characteristics (purpureus meaning purple in Latin), but without reliable documentation, we can’t confirm its appearance, growth habits, or native range.

The Challenge for Gardeners

Here’s where things get tricky for anyone considering adding Lotus purpureus to their garden. Without knowing key details about this plant, it’s difficult to recommend whether you should or shouldn’t grow it. We don’t have information about:

  • Its native status or geographic origin
  • Whether it’s invasive or beneficial
  • Its preferred growing conditions
  • USDA hardiness zones
  • Care requirements
  • Wildlife or pollinator benefits

A Word of Caution

When dealing with plants that have limited documentation, it’s wise to proceed carefully. If you’ve encountered this plant name through a seed catalog, plant sale, or online source, consider reaching out to botanical experts or your local extension office for guidance before planting.

Better-Documented Alternatives

If you’re interested in the Lotus genus for your garden, you might want to consider better-documented species instead. Many Lotus species are known for their attractive flowers, ability to fix nitrogen in the soil, and benefits to pollinators. Research well-established species that are appropriate for your region and growing conditions.

Moving Forward

The mysterious nature of Lotus purpureus serves as a reminder that not every plant name you encounter will have readily available growing information. When in doubt, it’s always best to choose plants with well-documented characteristics and known benefits for your local ecosystem.

If you have experience growing Lotus purpureus or have reliable information about this species, consider sharing your knowledge with fellow gardeners and botanical databases to help fill in these knowledge gaps.

Lotus Purpureus

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Lotus L. - trefoil

Species

Lotus purpureus Webb

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