North America Non-native Plant

Wight’s Neonotonia

Botanical name: Neonotonia wightii var. longicauda

USDA symbol: NEWIL

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

Wight’s Neonotonia: A Mysterious Plant Worth Investigating Meet Wight’s neonotonia (Neonotonia wightii var. longicauda), a plant that’s playing a bit of hide-and-seek with gardeners and botanists alike. While this flowering plant carries an intriguing name and belongs to the diverse world of dicotyledonous plants, it remains something of an enigma ...

Wight’s Neonotonia: A Mysterious Plant Worth Investigating

Meet Wight’s neonotonia (Neonotonia wightii var. longicauda), a plant that’s playing a bit of hide-and-seek with gardeners and botanists alike. While this flowering plant carries an intriguing name and belongs to the diverse world of dicotyledonous plants, it remains something of an enigma in the gardening world.

What We Know (And What We Don’t)

Here’s where things get interesting – and a bit frustrating for curious gardeners. Wight’s neonotonia appears to be either extremely rare, poorly documented, or perhaps exists only in very specific botanical collections. The limited information available makes it challenging to provide the comprehensive growing guide you might expect.

What we do know is that this plant belongs to the dicot group, meaning it’s a flowering plant with seeds that have two embryonic leaves. Beyond that basic classification and its botanical name, reliable details about its native range, growing conditions, and garden characteristics remain elusive.

The Challenge for Gardeners

If you’ve come across references to Wight’s neonotonia and are wondering whether to add it to your garden, you’re facing a common modern gardening dilemma. With incomplete information about its:

  • Native status and geographical distribution
  • Growth requirements and hardiness zones
  • Potential invasive or beneficial characteristics
  • Wildlife and pollinator benefits
  • Aesthetic qualities and garden design applications

Making an informed decision becomes nearly impossible.

A Word of Caution

When encountering plants with limited documentation, especially those that might be rare or of uncertain origin, it’s wise to proceed carefully. Without knowing the invasive potential, native status, or proper growing conditions, introducing any plant to your garden could have unintended consequences.

What Should You Do?

If you’re determined to learn more about Wight’s neonotonia, consider:

  • Contacting local botanical gardens or university extension services
  • Reaching out to native plant societies in your area
  • Consulting with professional botanists or horticulturists
  • Exploring well-documented native alternatives that offer similar characteristics

In the meantime, focusing on well-researched native plants with known benefits to local ecosystems might be your best bet for creating a thriving, environmentally responsible garden.

The Bottom Line

While Wight’s neonotonia remains a botanical mystery, this situation highlights the importance of choosing plants with well-documented characteristics and known benefits. Sometimes the most responsible gardening decision is to wait for more information – or to explore the many wonderful, well-understood native options available in your region.

Have you encountered this elusive plant or have additional information about it? The gardening community would certainly benefit from any insights you might share!

Wight’s Neonotonia

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

Neonotonia Lackey - neonotonia

Species

Neonotonia wightii (Wight & Arn.) Lackey - perennial soybean

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