North America Non-native Plant

Indigofera Nummulariifolia

Botanical name: Indigofera nummulariifolia

USDA symbol: INNU

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

Synonyms: Alysicarpus vaginalis (L.) DC. var. nummulariifolius (L.) Baker (ALVAN2)  ⚘  Indigofera echinata Willd. (INEC2)   

Indigofera nummulariifolia: The Mystery Plant You Probably Shouldn’t Grow Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head when you try to learn more about it? Meet Indigofera nummulariifolia, a botanical puzzle that’s more mystery than garden-worthy plant. What We Know (And Don’t Know) ...

Indigofera nummulariifolia: The Mystery Plant You Probably Shouldn’t Grow

Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head when you try to learn more about it? Meet Indigofera nummulariifolia, a botanical puzzle that’s more mystery than garden-worthy plant.

What We Know (And Don’t Know) About This Plant

Here’s where things get a bit tricky. Indigofera nummulariifolia belongs to the legume family, but reliable information about this specific species is surprisingly scarce. The plant has several synonyms, including Alysicarpus vaginalis var. nummulariifolius and Indigofera echinata, which actually adds to the confusion rather than clearing things up.

Without a clear common name or well-documented characteristics, this plant falls into that frustrating category of botanical question marks that even experienced gardeners struggle to pin down.

The Geographic Mystery

The native range of Indigofera nummulariifolia remains unclear, though it’s likely from tropical or subtropical regions based on its genus. However, without reliable distribution data, it’s impossible to determine where this plant naturally occurs.

Why This Plant Isn’t Garden-Ready

Here’s the honest truth: when a plant species lacks basic information about its growing requirements, appearance, and ecological role, it’s not a good candidate for your garden. Here’s why:

  • Unknown growing conditions make successful cultivation nearly impossible
  • Unclear native status means you can’t determine if it’s appropriate for your local ecosystem
  • Limited availability suggests it’s not commercially viable or well-established in cultivation
  • Taxonomic confusion makes it difficult to source the correct plant

Better Alternatives for Your Garden

Instead of wrestling with this botanical mystery, consider these well-documented Indigofera species that actually make great garden plants:

  • Indigofera kirilowii (Kirilow’s Indigo) – A hardy shrub with pink flowers
  • Indigofera decora (Chinese Indigo) – Compact with attractive foliage and pink blooms
  • Indigofera amblyantha – Pink-flowered species suitable for temperate gardens

The Takeaway for Smart Gardeners

Sometimes the most responsible gardening advice is knowing when to pass on a plant. Indigofera nummulariifolia falls into that category. With so many well-documented, beautiful, and ecologically beneficial plants available, there’s simply no reason to gamble on a species that might not even be what it claims to be.

Stick with plants that have clear growing requirements, known benefits to wildlife, and established track records in gardens. Your plants (and your sanity) will thank you for it!

Final Thoughts

While botanical mysteries can be intriguing, successful gardening relies on choosing plants with well-understood needs and benefits. If you’re drawn to the Indigofera genus, explore the proven species mentioned above instead. They’ll give you the satisfaction of growing something special without the frustration of working with an unknown quantity.

Indigofera Nummulariifolia

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

Indigofera L. - indigo

Species

Indigofera nummulariifolia (L.) Livera ex Alston

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