North America Non-native Plant

Oneflower Clover

Botanical name: Trifolium uniflorum

USDA symbol: TRUN5

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

Oneflower Clover: A Mysterious and Elusive Native Plant If you’ve stumbled across the name oneflower clover in your native plant research, you’ve discovered one of botany’s more enigmatic species. Trifolium uniflorum, as it’s scientifically known, is a plant that seems to exist more in botanical mystery than in our gardens—and ...

Oneflower Clover: A Mysterious and Elusive Native Plant

If you’ve stumbled across the name oneflower clover in your native plant research, you’ve discovered one of botany’s more enigmatic species. Trifolium uniflorum, as it’s scientifically known, is a plant that seems to exist more in botanical mystery than in our gardens—and there’s a very good reason for that.

What We Know (And What We Don’t)

Oneflower clover belongs to the legume family, related to the familiar white and red clovers you might see dotting lawns and meadows. True to its name, this species is distinguished by producing single flowers rather than the clustered flower heads typical of most clovers. But here’s where things get interesting—and a bit concerning.

This species appears to be extraordinarily rare, with extremely limited documented information available about its characteristics, distribution, or current status. The scarcity of reliable data suggests that oneflower clover may be critically endangered, extinct in the wild, or exists only in very specialized, restricted habitats.

Geographic Distribution and Rarity Concerns

The geographic range and current distribution of oneflower clover remains largely unknown or undocumented in accessible botanical resources. This lack of information is itself telling—it suggests this species has either always been extremely rare or has become so scarce that comprehensive studies haven’t been conducted in recent decades.

Should You Grow Oneflower Clover?

Here’s where we need to pump the brakes on any gardening enthusiasm. Given the apparent extreme rarity of this species, attempting to grow oneflower clover raises several important considerations:

  • Seeds or plants are highly unlikely to be available through normal commercial channels
  • If somehow available, the source would need to be thoroughly verified as responsibly obtained
  • Growing rare species without proper permits or conservation oversight could be problematic
  • The plant’s specific growing requirements remain unknown

Better Alternatives for Your Native Garden

Instead of searching for this botanical needle in a haystack, consider these well-documented native clovers that will actually thrive in your garden:

  • White clover (Trifolium repens): A hardy groundcover that supports pollinators
  • Red clover (Trifolium pratense): Taller with showy pink-purple flowers
  • Crimson clover (Trifolium incarnatum): Annual with striking red blooms

The Conservation Message

The mysterious case of oneflower clover serves as a reminder of how much we still don’t know about our native flora. Some plants slip through the cracks of botanical documentation, existing in such small numbers or remote locations that they remain largely unstudied.

If you’re passionate about rare native plants, consider supporting botanical surveys, herbarium collections, and conservation organizations that work to document and protect our lesser-known native species. Sometimes the most important thing we can do for a rare plant is simply to know it exists—and to protect the habitats where it might still survive.

For now, oneflower clover remains more of a botanical curiosity than a garden possibility. But who knows? Perhaps future botanical expeditions will shed more light on this elusive member of the clover family.

Oneflower Clover

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

Trifolium L. - clover

Species

Trifolium uniflorum L. - oneflower clover

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