North America Non-native Plant

Cajanus Goensis

Botanical name: Cajanus goensis

USDA symbol: CAGO4

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

Synonyms: Dolichos ornatus Wall., nom. nud. (DOOR3)   

Cajanus goensis: A Mysterious Member of the Pigeon Pea Family If you’ve stumbled across the name Cajanus goensis in your plant research, you’ve discovered one of botany’s more enigmatic characters. This little-known species belongs to the same genus as the widely cultivated pigeon pea, but unlike its famous cousin, Cajanus ...

Cajanus goensis: A Mysterious Member of the Pigeon Pea Family

If you’ve stumbled across the name Cajanus goensis in your plant research, you’ve discovered one of botany’s more enigmatic characters. This little-known species belongs to the same genus as the widely cultivated pigeon pea, but unlike its famous cousin, Cajanus goensis remains shrouded in mystery.

What We Know (And Don’t Know)

Here’s where things get interesting – and a bit frustrating for curious gardeners. Cajanus goensis is so poorly documented that even basic information like common names, native range, and growing requirements remain largely unknown. What we do know is that it has been classified under the synonym Dolichos ornatus Wall., but even that doesn’t shed much light on this elusive plant.

The lack of readily available information about its geographic distribution makes it difficult to provide specific regional guidance.

Should You Grow Cajanus goensis?

This is where we need to pump the brakes a bit. Without clear information about:

  • Native status and geographic origin
  • Growth habits and mature size
  • Environmental requirements
  • Potential invasive tendencies
  • Availability through reputable sources

It’s difficult to recommend Cajanus goensis for home gardens. The responsible approach is to exercise caution with any plant species that lacks comprehensive documentation.

A Better Alternative: Consider Well-Documented Cajanus Species

If you’re drawn to the Cajanus genus, consider starting with the well-known pigeon pea (Cajanus cajan) instead. This relative is:

  • Thoroughly documented and researched
  • Widely available from reputable nurseries
  • Known for its nitrogen-fixing abilities
  • Valued by pollinators and wildlife
  • Suitable for food production and ornamental use

The Bigger Picture

Cajanus goensis serves as a reminder that our plant world still holds many secrets. While the mystery is intriguing, it also highlights the importance of choosing well-documented, responsibly sourced plants for our gardens. When plant information is scarce, it’s often best to stick with species that have proven track records in cultivation.

What This Means for Your Garden

Rather than pursuing this botanical mystery, focus your energy on native plants that are well-suited to your specific region. These plants will provide reliable performance, support local ecosystems, and won’t leave you guessing about their care requirements or environmental impact.

Sometimes the most responsible gardening choice is knowing when to say not yet to a particular species – at least until more information becomes available.

Cajanus Goensis

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

Cajanus Adans. - cajanus

Species

Cajanus goensis Dalzell

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