North America Native Plant

Claoxylon

Botanical name: Claoxylon longiracemosum

USDA symbol: CLLO5

Life cycle: perennial

Habit: shrub

Native status: Native to Pacific Basin excluding Hawaii  

Claoxylon: A Rare Pacific Island Native Worth Knowing If you’re passionate about native plants and love discovering hidden gems in the botanical world, Claoxylon longiracemosum might just pique your interest. This lesser-known shrub hails from the beautiful Pacific islands, though you probably won’t find it at your local garden center ...

Claoxylon: A Rare Pacific Island Native Worth Knowing

If you’re passionate about native plants and love discovering hidden gems in the botanical world, Claoxylon longiracemosum might just pique your interest. This lesser-known shrub hails from the beautiful Pacific islands, though you probably won’t find it at your local garden center anytime soon.

What Exactly is Claoxylon?

Claoxylon longiracemosum is a perennial shrub that’s native to the Pacific Basin, specifically found growing naturally in Guam and Palau. Like most shrubs, it’s a multi-stemmed woody plant that typically stays under 13-16 feet tall, though it can occasionally grow taller or develop a single stem depending on environmental conditions.

This plant represents the fascinating diversity of Pacific island flora, adapted to the unique growing conditions of these tropical paradises.

Why Consider Growing Claoxylon?

Here’s the thing about Claoxylon longiracemosum – it’s something of a botanical mystery in the gardening world. While we know it exists and thrives in its native Pacific island habitat, detailed information about its horticultural potential is surprisingly scarce. This presents both challenges and opportunities for adventurous gardeners:

  • It’s a true native species, supporting local ecosystems where it naturally occurs
  • As a shrub, it could provide structure and year-round interest in appropriate climates
  • Its rarity in cultivation makes it a conversation starter for plant enthusiasts
  • Growing native plants helps preserve genetic diversity and supports conservation efforts

The Growing Challenge

Let’s be honest – growing Claoxylon longiracemosum is not going to be straightforward for most gardeners. Here’s what we can piece together about its needs:

Climate Requirements: Given its Pacific island origins, this shrub likely thrives in tropical to subtropical conditions, probably suited for USDA hardiness zones 10-12. Think warm, humid environments year-round.

Growing Conditions: While specific requirements aren’t well-documented, most Pacific island natives prefer well-draining soil, protection from harsh winds, and consistent moisture during establishment.

The Reality Check

Here’s where we need to be practical: unless you live in Guam, Palau, or a similar tropical climate, Claoxylon longiracemosum probably isn’t the right choice for your garden. The lack of readily available plants, seeds, or detailed growing information makes it more of a specialist’s pursuit than a practical landscape choice.

Better Alternatives for Most Gardeners

If you’re drawn to the idea of growing Pacific island natives or shrubs with similar characteristics, consider these more accessible options:

  • Native shrubs from your own region that provide similar structure and wildlife benefits
  • Well-documented tropical shrubs if you’re in an appropriate climate zone
  • Plants from reputable native plant societies that come with growing guidance and support

Supporting Conservation Instead

Sometimes the best way to appreciate rare plants like Claoxylon longiracemosum is to support their conservation in their native habitats. Consider donating to Pacific island conservation organizations or botanical gardens working to preserve these unique ecosystems.

The Bottom Line

Claoxylon longiracemosum represents the fascinating world of lesser-known native plants that exist quietly in their natural habitats. While it might not be practical for most home gardens, learning about plants like this reminds us of the incredible diversity of our planet’s flora and the importance of preserving native ecosystems.

For most gardeners, the best approach is to focus on well-documented native plants from your own region – you’ll have better success, clearer growing guidance, and you’ll be supporting your local ecosystem. But if you happen to live in the Pacific islands where Claoxylon naturally occurs, consider yourself lucky to share the landscape with such unique botanical treasures.

Claoxylon

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

Euphorbiales

Family

Euphorbiaceae Juss. - Spurge family

Genus

Claoxylon A. Juss. - claoxylon

Species

Claoxylon longiracemosum Hosok. - claoxylon

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