North America Native Plant

Anacolosa

Botanical name: Anacolosa

USDA symbol: ANACO2

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Anacolosa: A Rare Pacific Island Tree for Specialized Gardens If you’re looking for something truly unique in your garden, you might have stumbled across Anacolosa – a genus that’s about as exotic as it gets in the tree world. But before you get too excited, let’s talk about what makes ...

Anacolosa: A Rare Pacific Island Tree for Specialized Gardens

If you’re looking for something truly unique in your garden, you might have stumbled across Anacolosa – a genus that’s about as exotic as it gets in the tree world. But before you get too excited, let’s talk about what makes this Pacific island native both fascinating and challenging for home gardeners.

What Exactly is Anacolosa?

Anacolosa is a perennial tree that’s native to the Pacific Basin, specifically found growing in Palau. As a true tree species, it typically develops a single trunk and can reach impressive heights of over 13-16 feet, though some specimens may develop multiple stems under certain environmental conditions. Think of it as nature’s way of adapting to its island home.

Where Does It Grow Naturally?

Here’s where things get interesting (and potentially problematic for most gardeners): Anacolosa has an extremely limited natural range. It’s found in Palau, a small island nation in the western Pacific Ocean. This tiny geographic footprint makes it one of the more geographically restricted trees you might consider for cultivation.

Should You Plant Anacolosa in Your Garden?

This is where we need to have an honest conversation. While Anacolosa might sound intriguing, there are several practical challenges to consider:

  • Extremely limited availability – you’re unlikely to find this at your local nursery
  • Unknown growing requirements outside its native habitat
  • Lack of established cultivation practices
  • Uncertain climate adaptability

For most gardeners, especially those outside tropical Pacific regions, this tree would be more of a botanical curiosity than a practical landscaping choice.

Growing Conditions and Care

Unfortunately, specific growing conditions and care requirements for Anacolosa aren’t well-documented in horticultural literature. Given its Pacific island origins, it likely prefers:

  • Warm, tropical to subtropical conditions
  • High humidity levels
  • Well-draining soil
  • Protection from strong winds

However, without established cultivation guidelines, growing this tree would be largely experimental.

Better Alternatives for Your Garden

If you’re drawn to the idea of exotic Pacific island trees, consider these more readily available and better-understood alternatives:

  • Native trees from your own region that provide similar aesthetic appeal
  • Well-established tropical species with known growing requirements
  • Trees that support local wildlife and pollinators

The Bottom Line

While Anacolosa represents the fascinating diversity of Pacific island flora, it’s not a practical choice for most home gardeners. Its extremely limited native range, lack of cultivation information, and uncertain availability make it more suitable for botanical collections and specialized research facilities than backyard landscapes.

If you’re passionate about supporting biodiversity and unique plants, consider focusing on native species from your area or well-researched exotic plants that can thrive in your specific climate while contributing positively to your local ecosystem.

Anacolosa

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

Santalales

Family

Olacaceae R. Br. - Olax family

Genus

Anacolosa (Blume) Blume

Species

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