North America Native Plant

Palau Hackberry

Botanical name: Celtis palauensis

USDA symbol: CEPA23

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Palau Hackberry: A Rare Pacific Island Native Worth Knowing If you’re gardening in the tropical Pacific and looking for native trees that connect your landscape to the natural heritage of the region, you might want to learn about the Palau hackberry (Celtis palauensis). This lesser-known native tree offers the promise ...

Palau Hackberry: A Rare Pacific Island Native Worth Knowing

If you’re gardening in the tropical Pacific and looking for native trees that connect your landscape to the natural heritage of the region, you might want to learn about the Palau hackberry (Celtis palauensis). This lesser-known native tree offers the promise of authentic island landscaping, though finding one for your garden might prove to be quite the adventure.

What is Palau Hackberry?

Palau hackberry is a perennial tree native to the Pacific Basin, specifically documented in Palau and Guam. Like other trees in the Celtis family, it develops a single trunk and typically grows to heights greater than 13-16 feet, making it a substantial addition to any landscape where it can thrive.

As a true native species of the Pacific islands, this tree represents an important part of the region’s natural plant community, though it remains relatively unknown compared to more commonly cultivated tropical trees.

Where Does It Grow?

The Palau hackberry has a very limited natural range, found only in Guam and Palau. This restricted distribution makes it a special tree for gardeners in these specific Pacific locations.

Should You Plant Palau Hackberry?

Here’s where things get a bit tricky. While supporting native plants is always a admirable gardening goal, the Palau hackberry presents some unique challenges:

  • Very limited availability – you’re unlikely to find this tree at your local nursery
  • Restricted natural range means it’s only suitable for gardens in Palau and Guam
  • Limited information available about specific growing requirements and care
  • Unknown conservation status adds uncertainty about responsible sourcing

If you do live in Palau or Guam and are passionate about native plant gardening, this could be a meaningful addition to your landscape – but you’ll need to do some detective work to find responsibly sourced plants.

Growing Conditions and Care

Since the Palau hackberry is adapted to tropical Pacific island conditions, it likely prefers:

  • Warm, humid tropical climate
  • Well-draining soil (as most island soils tend to be)
  • Protection from strong winds (important for island trees)
  • Seasonal rainfall patterns typical of the Pacific region

Unfortunately, specific care instructions and propagation methods for this species aren’t well-documented, which means growing it successfully might require some experimentation and patience.

The Bottom Line

The Palau hackberry represents the kind of native plant that makes island gardens truly special and ecologically meaningful. However, its rarity and the limited information available make it more of a holy grail plant for dedicated native plant enthusiasts rather than a practical choice for most gardeners.

If you’re in Palau or Guam and serious about native gardening, it’s worth investigating whether this tree might be available through conservation organizations or native plant societies. Just remember to ensure any plants are ethically and sustainably sourced – we want to support native species, not deplete wild populations.

For most Pacific island gardeners, focusing on other well-established native trees might be a more practical approach to creating beautiful, ecologically valuable landscapes while you keep an eye out for opportunities to add rare gems like the Palau hackberry to your collection.

Palau Hackberry

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Hamamelididae

Order

Urticales

Family

Ulmaceae Mirb. - Elm family

Genus

Celtis L. - hackberry

Species

Celtis palauensis Kaneh. & Hatus. - Palau hackberry

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