Native Plants

Crabseye

Rhynchosia phaseoloides

USDA symbol: RHPH

perennial vine

Puerto Rico: native
U.S. Virgin Islands: native

Meet the crabseye (Rhynchosia phaseoloides), a charming native climbing plant that’s been quietly thriving in the Caribbean long before anyone thought to put it in a garden catalog. This perennial climber belongs to the bean family and brings a touch of wild Caribbean character to any landscape lucky enough to ...

Crabseye: A Native Caribbean Climbing Bean You Should Know About

Meet the crabseye (Rhynchosia phaseoloides), a charming native climbing plant that’s been quietly thriving in the Caribbean long before anyone thought to put it in a garden catalog. This perennial climber belongs to the bean family and brings a touch of wild Caribbean character to any landscape lucky enough to host it.

What Makes Crabseye Special

Crabseye is a true Caribbean native, calling Puerto Rico and the U.S. Virgin Islands home. As a twining, climbing plant, it can develop both woody and herbaceous stems that love to scramble up whatever support they can find. Think of it as nature’s way of adding vertical interest to the landscape – no planning required!

This plant grows naturally in Puerto Rico and the Virgin Islands, where it’s perfectly adapted to the local climate and conditions.

  • Species observed
  • No observations

Why Consider Growing Crabseye

If you’re gardening in Puerto Rico or the U.S. Virgin Islands, here’s why crabseye deserves a spot on your plant wish list:

  • True native credentials: Supporting local ecosystems has never been easier
  • Climbing habit: Perfect for adding height and structure to garden spaces
  • Perennial nature: Once established, it’s in it for the long haul
  • Low-maintenance potential: Native plants typically require less fussing once they settle in

Where It Thrives in the Garden

As a facultative upland plant, crabseye usually prefers well-drained areas but won’t throw a tantrum if it occasionally gets its feet wet. This flexibility makes it a great choice for various garden situations, from slopes to garden borders where drainage varies.

The climbing nature of crabseye makes it ideal for:

  • Training up trellises or arbors
  • Naturalizing along fence lines
  • Adding structure to native plant gardens
  • Creating habitat in wildlife-friendly landscapes

Growing Crabseye Successfully

Here’s where we hit a bit of a mystery – detailed cultivation information for crabseye is surprisingly scarce. This likely means it’s not commonly grown in traditional gardens, despite being a lovely native option. What we do know suggests it’s probably quite adaptable, given its native range and facultative upland status.

For the adventurous gardener wanting to try crabseye:

  • Provide some form of support for its climbing habit
  • Choose a location with good drainage, though occasional moisture is tolerated
  • Start with locally sourced plants or seeds when possible
  • Give it space to climb and spread naturally

A Plant Worth Exploring

Crabseye represents one of those wonderful native plants that hasn’t quite made it into mainstream gardening consciousness yet. For gardeners in Puerto Rico and the U.S. Virgin Islands, it offers a chance to grow something truly local and authentic to your landscape.

While detailed growing guides might be limited, sometimes the best garden adventures come from experimenting with plants that haven’t been over-studied and over-complicated by too much advice. If you can get your hands on some crabseye, you’ll be growing a piece of Caribbean botanical heritage – and who knows? You might just become the local expert on this charming native climber.

Just remember to source your plants responsibly and enjoy watching this native beauty find its place in your garden ecosystem.

Rhynchosia phaseoloides is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Rhynchosia phaseoloides is also known as:

Dolicholus pyramidalis auct. non Britton & | USDA symbol: DOPY
Glycine phaseoloides | USDA symbol: GLPH

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Caribbean (PR, VI)

Facultative Upland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Rosidae
Order: Fabales
Family: Fabaceae Lindl. - Pea family
Genus: Rhynchosia Lour. - snoutbean

Species: Rhynchosia phaseoloides (Sw.) DC. - crabseye

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