North America Non-native Plant

Melilotus Infestus

Botanical name: Melilotus infestus

USDA symbol: MEIN18

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

The Mystery of Melilotus infestus: A Plant That Might Not Exist If you’ve stumbled across the name Melilotus infestus in your gardening research, you’re not alone in wondering what exactly this plant is. Here’s the thing: this might be one of those botanical mysteries that keeps plant enthusiasts scratching their ...

The Mystery of Melilotus infestus: A Plant That Might Not Exist

If you’ve stumbled across the name Melilotus infestus in your gardening research, you’re not alone in wondering what exactly this plant is. Here’s the thing: this might be one of those botanical mysteries that keeps plant enthusiasts scratching their heads.

What We Know (And Don’t Know)

Melilotus infestus is listed in some databases, but here’s where things get interesting—or frustrating, depending on how you look at it. Despite extensive searching through botanical literature, plant databases, and horticultural resources, there’s virtually no reliable information about this particular species. It’s like trying to find a unicorn in your backyard.

The genus Melilotus, commonly known as sweet clover, is well-documented and includes several recognized species. But infestus? That’s where the trail goes cold.

The Sweet Clover Family Context

While we can’t tell you much about Melilotus infestus specifically, we can share what makes the Melilotus genus interesting. Sweet clovers are typically:

  • Annual or biennial herbs in the legume family
  • Known for their small, fragrant flowers
  • Often found in disturbed soils and roadsides
  • Capable of fixing nitrogen in the soil

Many Melilotus species have a reputation for being quite aggressive spreaders, and some are considered invasive in various regions.

Why This Matters for Gardeners

If you’re considering planting something labeled as Melilotus infestus, we’d recommend pumping the brakes. Here’s why:

  • The lack of documentation makes it impossible to know its growth habits
  • You can’t determine if it’s invasive or problematic
  • Without proper identification, you might be introducing an unknown element to your garden ecosystem
  • It could be a misidentified plant entirely

What Should You Do Instead?

If you’re drawn to the idea of growing a Melilotus species, consider these better-documented alternatives that are known quantities:

  • Research native legumes in your area that provide similar benefits
  • Consult with local native plant societies
  • Work with reputable nurseries that can verify plant identities
  • Consider well-documented native alternatives that support pollinators and fix nitrogen

The Bottom Line

Sometimes in the plant world, mystery doesn’t equal magic—it just means we need more information. Until reliable sources can confirm what Melilotus infestus actually is (or if it exists as described), it’s best to stick with plants that have clear identifications and known characteristics.

Your garden will thank you for choosing well-documented species that you can grow successfully and responsibly. After all, gardening is supposed to be enjoyable, not a guessing game!

Melilotus Infestus

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

Melilotus Mill. - sweetclover

Species

Melilotus infestus Guss.

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