North America Non-native Plant

Inga Fastulosa

Botanical name: Inga fastulosa

USDA symbol: INFA4

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

Inga fastulosa: The Mystery Tree That’s Hard to Pin Down If you’ve stumbled across the name Inga fastulosa in your plant research, you’re not alone in scratching your head. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, and here’s why you might want to pause ...

Inga fastulosa: The Mystery Tree That’s Hard to Pin Down

If you’ve stumbled across the name Inga fastulosa in your plant research, you’re not alone in scratching your head. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, and here’s why you might want to pause before adding it to your shopping list.

What We Know (And What We Don’t)

Inga fastulosa belongs to the legume family and falls under the broader Inga genus, which includes numerous tropical trees native to Central and South America. However, here’s where things get tricky: reliable, current information specifically about Inga fastulosa is surprisingly scarce in botanical databases and gardening resources.

This lack of information could mean several things:

  • The name might be outdated or no longer considered valid in current taxonomy
  • It could be an extremely rare or poorly documented species
  • There might be confusion with other Inga species that have similar names

The Geographic Mystery

While we can’t pinpoint the exact native range of Inga fastulosa, plants in the Inga genus typically hail from tropical regions of the Americas, stretching from Mexico down through Central America and into South America. Without specific distribution data, however, it’s impossible to say where this particular species calls home.

Should You Plant It?

Here’s our honest take: without reliable information about this plant’s characteristics, growing requirements, or potential impacts, we can’t recommend seeking it out for your garden. When plant information is this sparse, it often indicates one of several red flags that conscientious gardeners should heed.

Instead of chasing after this botanical mystery, consider these well-documented alternatives if you’re interested in tropical leguminous trees:

  • Look into other, better-documented Inga species if you’re in an appropriate tropical climate
  • Research native leguminous trees in your specific region
  • Consult with local botanical gardens or extension services for suitable recommendations

The Bottom Line

While the allure of rare or unusual plants can be tempting, Inga fastulosa falls into that frustrating category of botanical question marks. Without clear information about its growing requirements, native status, or potential environmental impacts, it’s simply not worth the risk or effort.

Your garden will be much happier—and you’ll be much more successful—sticking with plants that have well-documented growing guides and established track records. Save your energy for the many wonderful, well-understood native plants that are just waiting to thrive in your landscape!

If you’re determined to explore the Inga genus, work with reputable botanical institutions or specialized tropical plant nurseries that can provide properly identified specimens and growing guidance. Your plants, your garden, and the environment will thank you for the extra diligence.

Inga Fastulosa

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

Inga Mill. - inga

Species

Inga fastulosa (Jacq.) Willd. [excluded]

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