North America Native Plant

Shirakiopsis

Botanical name: Shirakiopsis

USDA symbol: SHIRA

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Shirakiopsis: A Mysterious Pacific Island Tree If you’ve stumbled across the name shirakiopsis in your plant research, you’re likely as curious as we are about this enigmatic tree species. Shirakiopsis represents one of those fascinating botanical mysteries that reminds us just how much we still have to discover about our ...

Shirakiopsis: A Mysterious Pacific Island Tree

If you’ve stumbled across the name shirakiopsis in your plant research, you’re likely as curious as we are about this enigmatic tree species. Shirakiopsis represents one of those fascinating botanical mysteries that reminds us just how much we still have to discover about our planet’s plant life.

What We Know About Shirakiopsis

This perennial tree species calls the Pacific Basin home, specifically growing in the island nation of Palau. As a true tree, shirakiopsis typically develops a single trunk and can reach impressive heights of over 13 to 16 feet, though like many trees, it may occasionally develop multiple stems or stay shorter depending on environmental conditions.

Palau, located in the western Pacific Ocean, is known for its incredible biodiversity and unique endemic species. The fact that shirakiopsis is found in this biodiverse hotspot suggests it’s likely adapted to tropical island conditions.

The Challenge for Home Gardeners

Here’s where things get tricky for gardening enthusiasts. Despite our best research efforts, detailed information about shirakiopsis’s specific growing requirements, appearance, and cultivation needs remains elusive. This lack of available information presents several challenges:

  • Unknown hardiness zones and climate requirements
  • Unclear aesthetic qualities and seasonal interest
  • Uncertain propagation methods
  • Unknown soil and water preferences
  • Unclear wildlife and pollinator benefits

What This Means for Your Garden

Given the limited information available about shirakiopsis, it’s not a plant we can readily recommend for home gardens. The lack of cultivation information, combined with its specific Pacific island origins, suggests this tree is likely:

  • Adapted to very specific tropical conditions
  • Potentially difficult to source commercially
  • Possibly requiring specialized care knowledge

Alternative Native Options

If you’re interested in growing Pacific island natives or trees with similar tropical appeal, consider researching well-documented species native to your specific region. Your local native plant society or extension office can help you identify trees that will thrive in your climate while supporting local ecosystems.

The Bigger Picture

Shirakiopsis serves as a reminder that botanical diversity is vast and still being documented. Many plant species, particularly those from remote island locations, remain understudied from a horticultural perspective. This doesn’t make them less valuable – quite the opposite! It highlights the importance of botanical research and conservation efforts in places like Palau.

While we can’t guide you through growing shirakiopsis in your backyard, we can encourage you to explore the wealth of native plants that are well-suited to your local conditions. These plants will not only be easier to grow successfully but will also provide maximum benefits to your local wildlife and ecosystem.

Shirakiopsis

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

Shirakiopsis Esser - shirakiopsis

Species

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