North America Non-native Plant

Crotalaria Filipes

Botanical name: Crotalaria filipes

USDA symbol: CRFI5

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

Crotalaria filipes: A Mystery Plant Worth Investigating Sometimes in the gardening world, we stumble across plant names that spark curiosity but leave us scratching our heads when we try to learn more. Crotalaria filipes is one of those intriguing botanical mysteries that highlights just how much we still don’t know ...

Crotalaria filipes: A Mystery Plant Worth Investigating

Sometimes in the gardening world, we stumble across plant names that spark curiosity but leave us scratching our heads when we try to learn more. Crotalaria filipes is one of those intriguing botanical mysteries that highlights just how much we still don’t know about the plant kingdom.

What We Know (And Don’t Know)

Crotalaria filipes belongs to the genus Crotalaria, commonly known as rattlepods or rattleboxes. These plants get their quirky common name from their seed pods, which develop hard seeds that rattle around inside when the pods dry out. However, when it comes to the specific details about C. filipes, reliable information is surprisingly scarce.

Here’s what makes this plant particularly mysterious:

  • Its native range and geographical distribution are unclear
  • Common names for this specific species are unknown
  • Growing requirements and hardiness zones haven’t been well documented
  • Its conservation status remains uncertain

The Crotalaria Connection

While we can’t tell you much about C. filipes specifically, we can share what’s typical of its plant family. Most Crotalaria species are known for their bright yellow, pea-like flowers and their role as nitrogen-fixing plants. Many species in this genus can be beneficial for soil improvement, though some are also known to contain compounds that can be harmful to livestock.

Should You Try to Grow It?

Here’s where things get tricky. Without knowing the native status, invasive potential, or specific growing requirements of Crotalaria filipes, it’s difficult to make a recommendation either way. If you’ve encountered this plant name and are curious about growing it, we’d suggest a few cautious steps:

  • Research thoroughly through botanical databases and local extension services
  • Contact native plant societies in your area for guidance
  • Consider whether better-documented native alternatives might serve your garden goals
  • If you do find seeds or plants, ensure they’re from reputable, ethical sources

Better Safe Than Sorry

When information about a plant species is limited, it’s often wiser to focus on well-documented native plants that we know will benefit local ecosystems. Your local native plant society or extension office can recommend rattlepod species or similar nitrogen-fixing plants that are known to be appropriate for your area.

The Takeaway

Crotalaria filipes serves as a good reminder that the plant world still holds many secrets. While our curiosity about unusual species is natural and wonderful, responsible gardening sometimes means choosing the plants we understand over the ones that remain mysterious. If you’re drawn to the idea of growing rattlepods, start with species that have well-documented benefits and known native ranges in your area.

Who knows? Maybe someday we’ll know more about this elusive species. Until then, there are plenty of other fascinating native plants waiting to find homes in our gardens.

Crotalaria Filipes

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

Crotalaria L. - rattlebox

Species

Crotalaria filipes Benth.

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