North America Non-native Plant

Trifolium Affine

Botanical name: Trifolium affine

USDA symbol: TRAF4

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

Trifolium affine: The Mystery Clover That’s Hard to Pin Down If you’ve stumbled upon the name Trifolium affine in your plant research, you’re not alone in wondering what exactly this species is all about. This particular member of the clover family (Trifolium genus) is something of an enigma in the ...

Trifolium affine: The Mystery Clover That’s Hard to Pin Down

If you’ve stumbled upon the name Trifolium affine in your plant research, you’re not alone in wondering what exactly this species is all about. This particular member of the clover family (Trifolium genus) is something of an enigma in the gardening world, with very limited information available even in botanical databases.

What We Know (And What We Don’t)

Trifolium affine belongs to the diverse clover genus, which includes over 300 species worldwide. However, unlike its well-documented cousins like white clover or red clover, this particular species remains poorly understood in terms of its characteristics and growing requirements.

The lack of readily available information about Trifolium affine could indicate several possibilities:

  • It may be an extremely localized or rare species
  • The name might be obsolete or incorrectly applied
  • It could be a regional variant that hasn’t been widely studied

Geographic Distribution

Unfortunately, reliable information about where Trifolium affine naturally occurs is not readily available in standard botanical references.

Should You Try Growing It?

Here’s where things get tricky. Without clear information about this species’ native status, growing requirements, or potential invasiveness, it’s difficult to make a recommendation either way. If you’re considering planting what you believe to be Trifolium affine, here are some thoughts:

A Safer Alternative Approach

Rather than taking a gamble on a poorly documented species, consider these well-established native clovers that might serve your garden better:

  • Check with your local native plant society for clover species native to your area
  • Consult regional botanical databases or herbarium records
  • Contact your county extension office for locally appropriate legume recommendations

The Bottom Line

While the mystery surrounding Trifolium affine might spark curiosity, the lack of reliable growing information makes it a risky choice for gardeners. Your time and garden space are better invested in well-documented native species that you know will thrive in your conditions and support local ecosystems.

If you have seeds or plants labeled as Trifolium affine, consider having them properly identified by a local botanist or extension agent before planting. You might discover you have a different, better-understood species that would be perfect for your garden!

Trifolium Affine

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 affine C. Presl

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