North America Native Plant

American Snoutbean

Botanical name: Rhynchosia americana

USDA symbol: RHAM

Life cycle: perennial

Habit: vine

Native status: Native to the lower 48 states  

Synonyms: Lathyrus americanus Houst. ex Mill. (LAAM2)   

American Snoutbean: A Texas Native That’s Perfect for Low-Maintenance Gardens If you’re looking for a native plant that practically grows itself while providing valuable wildlife benefits, let me introduce you to American snoutbean (Rhynchosia americana). This charming little perennial might not win any beauty contests, but what it lacks in ...

American Snoutbean: A Texas Native That’s Perfect for Low-Maintenance Gardens

If you’re looking for a native plant that practically grows itself while providing valuable wildlife benefits, let me introduce you to American snoutbean (Rhynchosia americana). This charming little perennial might not win any beauty contests, but what it lacks in showiness, it more than makes up for in practicality and ecological value.

What is American Snoutbean?

American snoutbean is a native perennial forb that belongs to the legume family. As a forb, it’s essentially a non-woody plant that stays relatively low to the ground, making it perfect for naturalizing areas or filling in gaps in your landscape. Don’t let the snoutbean name fool you – while the seed pods might have a distinctive shape that inspired the common name, this plant is all about function over form.

Where Does American Snoutbean Grow?

This Texas native is perfectly adapted to the Lone Star State’s challenging growing conditions. While it’s native to the lower 48 states, Texas is really where this plant shines. If you’re gardening in USDA hardiness zones 8-10, you’re in the sweet spot for growing American snoutbean successfully.

Why Plant American Snoutbean in Your Garden?

Here’s where American snoutbean really wins points with practical gardeners:

  • Wildlife magnet: Large animals get 5-10% of their diet from this plant, while birds rely on it for 10-25% of their nutrition
  • Pollinator friendly: The small yellow pea-like flowers attract native bees and other beneficial insects
  • Low maintenance: Once established, it’s incredibly drought tolerant
  • Native credentials: Supporting local ecosystems while reducing water needs
  • Ground coverage: Fills in areas with its trailing, climbing habit

What Does American Snoutbean Look Like?

American snoutbean has a modest appearance that fits perfectly into naturalistic gardens. The plant produces small yellow flowers typical of the legume family, along with distinctive trifoliate leaves (three leaflets per leaf). Its growth habit is trailing to climbing, making it useful as a ground cover or for softening edges in your landscape design.

Perfect Garden Settings

American snoutbean thrives in:

  • Native plant gardens
  • Wildlife habitat areas
  • Xeriscapes and drought-tolerant landscapes
  • Naturalizing areas where you want low-maintenance coverage
  • Pollinator gardens

Growing Conditions and Care

The beauty of American snoutbean lies in its simplicity. This plant prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils (it’s not picky about soil type)
  • Water: Minimal once established – perfect for water-wise gardening
  • Maintenance: Practically none required

Planting and Care Tips

Getting American snoutbean established is refreshingly straightforward:

  • Plant in spring after the last frost
  • Water regularly during the first growing season to help establish roots
  • After establishment, supplemental watering is rarely needed
  • No fertilization required – as a legume, it actually fixes nitrogen in the soil
  • Allow it to go to seed if you want it to naturalize in your garden

The Bottom Line

American snoutbean might not be the star of your garden show, but it’s definitely the reliable supporting actor that makes everything else possible. If you’re creating wildlife habitat, need a low-maintenance ground cover, or simply want to support native ecosystems, this humble Texas native deserves a spot in your landscape. Plus, knowing that you’re providing substantial nutrition for local wildlife while barely lifting a finger makes it even more appealing.

Sometimes the best plants are the ones that quietly do their job while you focus on the more dramatic players in your garden. American snoutbean is exactly that kind of plant – and your local wildlife will thank you for it.

Wildlife Status

Want to attract wildlife or keep hungry critters away from your garden? Understanding the relationship between plants and wildlife is key. While plant tags may indicate deer and rabbit resistance, they don't tell the full story. Every gardener has experienced the disappointment of purchasing "deer-resistant" plants only to find them nibbled to the ground!

The extent to which plants are resistant to animal browsing is a matter of degree. Likewise, the extent to which a plant attracts wanted visitors also varies. Whether you want a garden full or free of wildlife, learning about interactions between a plant and wild animals can help you make smarter choices for the garden you desire.

As shown below Shrubby Indian Mallow isn't a large food source for animals or birds. You can confidently add this plant to your garden and rest assured knowing it's unlikely to be devoured by four-legged visitors.

Small animals

not a food source

not a source of cover

Large animals

5-10% of diet

Infrequently used as cover

Terrestrial birds

Average 10-25% of diet

Occasional source of cover

Water birds

not a food source

not a source of cover

Sources:

Everitt, J.H., D.L. Drawe, and R.I. Lonard. 1999. Field guide to the broad leaved herbaceous plants of South Texas used by livestock and wildlife. Texas Tech University Press. Lubbock.

American Snoutbean

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

Rhynchosia Lour. - snoutbean

Species

Rhynchosia americana (Houst. ex Mill.) M.C. Metz - American snoutbean

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