Native Plants

Devil’s-cotton

Abroma augustum

USDA symbol: ABAU3

perennial shrub

Pacific Basin excluding Hawaii: native

If you’ve never heard of devil’s-cotton, you’re not alone. This Pacific native shrub, scientifically known as Abroma augustum, is one of those plants that flies under the radar in most gardening circles. But for gardeners in the right location, it might just be worth getting to know. Devil’s-cotton is a ...

Devil’s-Cotton: A Lesser-Known Pacific Native Worth Knowing About

If you’ve never heard of devil’s-cotton, you’re not alone. This Pacific native shrub, scientifically known as Abroma augustum, is one of those plants that flies under the radar in most gardening circles. But for gardeners in the right location, it might just be worth getting to know.

What is Devil’s-Cotton?

Devil’s-cotton is a perennial shrub that’s native to the Pacific Basin, though it doesn’t naturally occur in Hawaii. This multi-stemmed woody plant typically grows to less than 13-16 feet in height, making it a manageable size for most garden settings. Like many shrubs, it usually develops several stems from ground level, though environmental conditions can sometimes encourage different growth patterns.

In Palau, locals know this plant by another name: lab. It’s always fascinating how different cultures develop their own common names for the same plant!

Where Does Devil’s-Cotton Grow?

Currently, you’ll find devil’s-cotton growing naturally in Guam and Palau. This limited geographic distribution makes it a pretty exclusive plant in the gardening world.

  • Species observed
  • No observations

The Gardening Reality Check

Here’s where we need to be honest: there’s surprisingly little detailed information available about growing devil’s-cotton in garden settings. This isn’t necessarily a bad thing – it just means this plant hasn’t made it into mainstream horticulture yet.

What we do know is that it’s a native species in its home range, which typically means:

  • It’s adapted to local climate conditions
  • It likely supports local wildlife in some way
  • It shouldn’t pose invasive risks in its native territories

Should You Try Growing Devil’s-Cotton?

If you’re gardening in Guam or Palau, devil’s-cotton could be an excellent choice for a native plant garden. Native plants are almost always the best choice for supporting local ecosystems, and they’re typically easier to grow since they’re already adapted to your climate.

For gardeners elsewhere, this plant presents some challenges. Without clear information about its growing requirements, hardiness zones, or care needs, it’s difficult to recommend with confidence. You’d essentially be experimenting, which can be fun if you’re up for the adventure but frustrating if you prefer guaranteed results.

The Bottom Line

Devil’s-cotton represents one of those intriguing native plants that deserves more attention from the gardening world. If you’re in its native range and interested in supporting local plant communities, it’s worth seeking out. Just be prepared to do some detective work when it comes to growing requirements – you might be pioneering its use in cultivation!

For gardeners outside the Pacific Basin, you might want to focus on native plants from your own region instead. Every area has its own fascinating native species that are better documented and easier to grow successfully.

Sometimes the most interesting plants are the ones we know the least about – devil’s-cotton definitely falls into that category!

Abroma augustum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Abroma augustum is also known as:

Abroma augusta f., orth. var. | USDA symbol: ABAU2
Ambroma augusta f., orth. var. | USDA symbol: AMAU4
Ambroma augustum f., orth. var. | USDA symbol: AMAU5

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Dilleniidae
Order: Malvales
Family: Sterculiaceae Vent. - Cacao family
Genus: Abroma Jacq.

Species: Abroma augustum (L.) L. f. - devil's-cotton

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