North America Non-native Plant

Canavalia Megalantha Var. Megalantha

Botanical name: Canavalia megalantha var. megalantha

USDA symbol: CAMEM2

Life cycle: perennial

Habit: vine

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

Canavalia megalantha var. megalantha: The Mystery Bean That’s Hard to Find If you’ve stumbled across the name Canavalia megalantha var. megalantha in your plant research, you’re not alone in wondering what exactly this botanical mystery is all about. This perennial herb belongs to a group of plants that are more ...

Canavalia megalantha var. megalantha: The Mystery Bean That’s Hard to Find

If you’ve stumbled across the name Canavalia megalantha var. megalantha in your plant research, you’re not alone in wondering what exactly this botanical mystery is all about. This perennial herb belongs to a group of plants that are more famous for their absence from garden centers than their presence in our landscapes!

What We Know (And What We Don’t)

Here’s the honest truth: Canavalia megalantha var. megalantha is one of those plants that seems to exist more in botanical databases than in actual gardens. What we do know is that it’s a perennial forb – essentially a non-woody plant that comes back year after year. Think of it as the botanical equivalent of that friend everyone talks about but no one has actually met.

This plant lacks the significant woody tissue that would make it a shrub or tree, instead sporting the herbaceous growth habit that characterizes many wildflowers and garden perennials.

The Great Geographic Mystery

Where does this elusive plant call home? That’s another piece of the puzzle that remains unsolved. Without clear information about its native range, geographical distribution, or even basic growing requirements, Canavalia megalantha var. megalantha remains something of a botanical enigma.

Should You Try to Grow It?

Here’s where things get interesting (and a bit frustrating for eager gardeners). With so little information available about this plant’s:

  • Growing conditions and care requirements
  • USDA hardiness zones
  • Native status and ecological role
  • Availability from nurseries or seed sources

It’s difficult to recommend whether you should add it to your garden wish list or cross it off entirely.

The Practical Reality

For most home gardeners, the lack of available information about Canavalia megalantha var. megalantha makes it an impractical choice. Without knowing its preferred growing conditions, mature size, or even where to source it, you’d be taking a significant gamble.

If you’re drawn to the Canavalia genus, you might have better luck researching other species in the group that have more documented cultivation information and reliable sources.

What This Means for Your Garden

Sometimes the most honest advice is the simplest: when a plant is this obscure and poorly documented, it’s usually better to focus your gardening energy on species with proven track records and available cultivation guidance.

Consider exploring well-documented native perennial herbs in your area instead. Your local native plant society or extension office can point you toward reliable alternatives that will give you the satisfaction of successful growing without the mystery and uncertainty.

The Bottom Line

Canavalia megalantha var. megalantha remains one of those botanical curiosities that’s more interesting as a research subject than as a garden plant. Until more information becomes available about its growing requirements, native status, and ecological benefits, it’s probably best admired from afar – assuming you can even find it to admire!

Canavalia Megalantha Var. Megalantha

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

Canavalia Adans. - jackbean

Species

Canavalia megalantha Merr.

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