North America Native Plant

Blacheos

Botanical name: Gmelina palawensis

USDA symbol: GMPA

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Blacheos: A Native Pacific Tree Worth Considering If you’re gardening in the Pacific islands and looking for native options, you might want to get acquainted with blacheos (Gmelina palawensis). This lesser-known native tree species offers an intriguing option for those committed to supporting local ecosystems, though admittedly, it’s not the ...

Blacheos: A Native Pacific Tree Worth Considering

If you’re gardening in the Pacific islands and looking for native options, you might want to get acquainted with blacheos (Gmelina palawensis). This lesser-known native tree species offers an intriguing option for those committed to supporting local ecosystems, though admittedly, it’s not the easiest plant to research or find information about!

What is Blacheos?

Blacheos is a perennial tree native to the Pacific Basin, specifically documented in Guam and Palau. As a member of the Gmelina genus, it’s a woody plant that typically develops a single trunk and can reach impressive heights of 13-16 feet or more under the right conditions. Like many tropical trees, it may occasionally develop multiple stems or stay shorter depending on environmental factors.

Where Does It Grow Naturally?

This native beauty calls the Pacific Basin home, excluding Hawaii. You’ll find it naturally occurring in:

  • Guam
  • Palau

Should You Plant Blacheos in Your Garden?

Here’s where things get a bit tricky – and honestly, a little frustrating for us plant enthusiasts. While blacheos has the appeal of being a true native species (which is always a win for supporting local wildlife and ecosystems), there’s surprisingly little readily available information about its specific growing requirements, care needs, or even its appearance details.

If you’re in Guam or Palau and passionate about native gardening, this could be an exciting species to explore. However, you’ll likely need to do some detective work or connect with local botanical experts to learn more about successful cultivation.

Growing Conditions and Care

Unfortunately, specific growing condition information for Gmelina palawensis is limited in readily available sources. As a Pacific Basin native, it’s likely adapted to:

  • Tropical or subtropical climates
  • The specific soil and rainfall conditions of its native islands
  • Natural growing conditions found in Guam and Palau

For successful cultivation, we’d recommend reaching out to local agricultural extensions, botanical gardens, or native plant societies in Guam or Palau for region-specific growing advice.

The Bottom Line

Blacheos represents an interesting piece of Pacific island biodiversity, and for gardeners in its native range, it could be a valuable addition to native plant landscapes. However, the limited cultivation information available means you’ll be somewhat pioneering if you choose to grow it.

If you’re outside its native range or looking for well-documented alternatives, consider researching other native trees in your specific location that can provide similar ecosystem benefits with more readily available growing guidance.

Sometimes the most rewarding gardening adventures involve plants that haven’t been written about extensively – just make sure you’re prepared for a bit of experimentation and local expert consultation along the way!

Blacheos

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Verbenaceae J. St.-Hil. - Verbena family

Genus

Gmelina L. - gmelina

Species

Gmelina palawensis H.J. Lam - blacheos

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