North America Non-native Plant

Centrosema Arenarium

Botanical name: Centrosema arenarium

USDA symbol: CEAR10

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

Centrosema arenarium: The Mysterious Native That’s Hard to Pin Down Ever stumble across a plant name that sends you down a rabbit hole of research, only to come up mostly empty-handed? Meet Centrosema arenarium, a member of the legume family that’s proving to be quite the botanical enigma. If you’re ...

Centrosema arenarium: The Mysterious Native That’s Hard to Pin Down

Ever stumble across a plant name that sends you down a rabbit hole of research, only to come up mostly empty-handed? Meet Centrosema arenarium, a member of the legume family that’s proving to be quite the botanical enigma. If you’re scratching your head wondering why you can’t find much information about this plant, you’re not alone!

What We Know (And What We Don’t)

Here’s the thing about Centrosema arenarium – it’s one of those plants that seems to exist more in scientific literature than in everyday gardening conversations. While it belongs to the Centrosema genus, which includes some lovely flowering vines and groundcovers, this particular species remains frustratingly elusive when it comes to detailed growing information.

The lack of readily available information could mean several things: it might be a regional endemic with very limited distribution, a recently described species that hasn’t made its way into popular gardening circles, or it could be taxonomically uncertain. Sometimes plant names exist in databases without comprehensive growing guides following close behind.

The Centrosema Connection

What we can tell you is that Centrosema species, in general, are typically:

  • Members of the legume family (Fabaceae)
  • Often climbing or trailing plants
  • Producers of attractive butterfly-shaped flowers
  • Nitrogen-fixers that can improve soil health
  • Generally warm-climate plants

However, we can’t assume C. arenarium shares all these characteristics without specific documentation.

Should You Try to Grow It?

Here’s where things get tricky. Without reliable information about its native range, growing requirements, or potential invasiveness, it’s difficult to recommend for or against planting Centrosema arenarium. The responsible approach? Hold off until you can find more specific information.

If you’re drawn to the idea of growing a Centrosema species, consider looking into better-documented relatives like:

  • Centrosema virginianum (Spurred Butterfly Pea)
  • Centrosema pubescens (Centro)

These species have established growing guides and known native ranges, making them safer bets for your garden.

The Bottom Line

Sometimes in the plant world, mystery doesn’t equal magic. While Centrosema arenarium might sound intriguing, the lack of available growing information makes it a risky choice for most gardeners. Your time and garden space might be better invested in well-documented native plants that you can grow with confidence.

If you’re specifically researching this plant for academic or conservation purposes, we’d recommend reaching out to botanical institutions or herbaria that might have more detailed specimen information. For everyday gardening, though, there are plenty of other beautiful native options that won’t leave you guessing about their needs!

Centrosema Arenarium

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

Centrosema (DC.) Benth. - butterfly pea

Species

Centrosema arenarium Benth.

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