North America Non-native Plant

Turnera Scabra

Botanical name: Turnera scabra

USDA symbol: TUSC2

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

Synonyms: Turnera ulmifolia L. var. intermedia Urb. (TUULI2)   

Turnera scabra: A Mysterious Member of the Turnera Family If you’ve stumbled upon the name Turnera scabra while planning your garden, you might be scratching your head wondering what exactly this plant is. Well, you’re not alone! This particular species name exists in something of a botanical gray area, making ...

Turnera scabra: A Mysterious Member of the Turnera Family

If you’ve stumbled upon the name Turnera scabra while planning your garden, you might be scratching your head wondering what exactly this plant is. Well, you’re not alone! This particular species name exists in something of a botanical gray area, making it a puzzling choice for gardeners seeking reliable plant information.

The Mystery Behind the Name

Turnera scabra appears to be closely related to, or possibly a variety of, the more well-known Turnera ulmifolia (commonly called Yellow Alder or West Indian Holly). The synonym Turnera ulmifolia var. intermedia suggests this connection, but finding concrete information specifically about Turnera scabra as a distinct species proves challenging.

What We Know (And Don’t Know)

Here’s the honest truth about Turnera scabra:

  • Common names: Unknown or not established
  • Native range: Unclear
  • Growing requirements: Not specifically documented
  • Garden performance: No reliable data available
  • Wildlife benefits: Undocumented for this specific name

Geographic Distribution

The geographic distribution of Turnera scabra remains unclear, though if it’s related to Turnera ulmifolia, it would likely have origins in tropical or subtropical regions of the Americas.

Should You Plant Turnera scabra?

Given the uncertainty surrounding this plant’s identity and characteristics, I’d recommend pausing before adding Turnera scabra to your shopping list. Without clear information about its growth habits, care requirements, or even its exact botanical status, you’d essentially be gardening in the dark.

Better Alternatives to Consider

If you’re drawn to the Turnera genus, consider these better-documented alternatives:

  • Turnera ulmifolia (Yellow Alder): Well-documented with bright yellow flowers
  • Native wildflowers: Research plants native to your specific region
  • Other pollinator-friendly shrubs: Choose species with proven garden performance

The Bottom Line

While botanical mysteries can be intriguing, they don’t make for reliable garden planning. When choosing plants for your landscape, stick with species that have well-documented growing requirements, clear native status, and proven garden performance. Your plants (and your gardening success) will thank you for it!

If you’re specifically interested in Turnera scabra for research purposes or have encountered this name in old botanical literature, consider reaching out to botanical gardens or university herbaria for clarification on its current taxonomic status.

Turnera Scabra

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Turneraceae Kunth ex DC. - Turnera family

Genus

Turnera L. - turnera

Species

Turnera scabra Millsp. [excluded]

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