North America Non-native Plant

Corky Spindletree

Botanical name: Euonymus alatus var. apterus

USDA symbol: EUALA3

Life cycle: perennial

Habit: shrub

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Synonyms: Euonymus alatus (Thunb.) Siebold var. ciliato-dentatus Franch. & Sav. (EUALC)  âš˜  Euonymus aptera Regel, orth. var. (EUAP5)  âš˜  Euonymus apterus Regel, nom. inq. (EUAP6)   

Corky Spindletree: A Lesser-Known Shrub with Limited Information If you’ve stumbled across the name corky spindletree (Euonymus alatus var. apterus) in your plant research, you’re not alone in finding limited information about this particular variety. This shrub is a bit of a botanical mystery, with sparse details available compared to ...

Corky Spindletree: A Lesser-Known Shrub with Limited Information

If you’ve stumbled across the name corky spindletree (Euonymus alatus var. apterus) in your plant research, you’re not alone in finding limited information about this particular variety. This shrub is a bit of a botanical mystery, with sparse details available compared to its more common relatives in the Euonymus family.

What We Know About Corky Spindletree

Corky spindletree is a perennial, multi-stemmed woody shrub that typically grows less than 13 to 16 feet in height. Like other shrubs, it usually has several stems arising from or near the ground, though it can sometimes grow taller or develop a single stem depending on environmental conditions.

The apterus part of its scientific name means wingless, which likely refers to a distinguishing characteristic that sets it apart from other varieties in the Euonymus alatus group.

Where Does It Grow?

This non-native species has been found growing wild in Kentucky and Pennsylvania, where it reproduces naturally without human assistance. However, it’s important to note that this represents a very limited geographical distribution compared to many other ornamental shrubs.

The Information Gap

Here’s where things get tricky for gardeners: there’s surprisingly little specific information available about this particular variety. We don’t have clear data on:

  • Its invasive potential
  • Specific growing conditions it prefers
  • Wildlife and pollinator benefits
  • Detailed care requirements
  • USDA hardiness zones
  • Propagation methods

Should You Plant It?

Given the limited information available and its non-native status, you might want to consider well-documented native alternatives instead. Native shrubs offer several advantages:

  • Better support for local wildlife and pollinators
  • Proven adaptation to local growing conditions
  • Extensive cultivation information available
  • No risk of unexpected invasive behavior

Native Alternatives to Consider

Instead of corky spindletree, consider these native shrub options that provide similar multi-stemmed structure and seasonal interest:

  • Native viburnums for berry production and fall color
  • Spicebush (Lindera benzoin) for early spring blooms
  • Native dogwoods for four-season appeal
  • Elderberry species for wildlife value

The Bottom Line

While corky spindletree might seem like an interesting addition to your landscape, the lack of available growing information makes it a challenging choice for most gardeners. Without knowing its specific needs, potential invasive tendencies, or ecological benefits, you’re essentially gardening in the dark.

Your garden will likely be more successful and environmentally beneficial with native plants that have been thoroughly studied and documented. These alternatives will give you the confidence that comes with knowing exactly what you’re planting and how to help it thrive.

Corky Spindletree

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

Celastrales

Family

Celastraceae R. Br. - Bittersweet family

Genus

Euonymus L. - spindletree

Species

Euonymus alatus (Thunb.) Siebold - burningbush

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