North America Native Plant

Mesekui

Botanical name: Astronidium palauense

USDA symbol: ASPA37

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Mesekui: A Rare Pacific Island Native Tree Worth Knowing If you’re passionate about native plants and happen to live in or garden within the tropical Pacific region, you might want to learn about mesekui (Astronidium palauense). This lesser-known native tree species offers gardeners in Guam and Palau a chance to ...

Mesekui: A Rare Pacific Island Native Tree Worth Knowing

If you’re passionate about native plants and happen to live in or garden within the tropical Pacific region, you might want to learn about mesekui (Astronidium palauense). This lesser-known native tree species offers gardeners in Guam and Palau a chance to cultivate something truly local to their islands.

What Makes Mesekui Special?

Mesekui is a perennial tree that’s native to the Pacific Basin, specifically found in Guam and Palau. As a true native species, it has evolved alongside the local ecosystem for thousands of years, making it perfectly adapted to the unique conditions of these Pacific islands.

This woody tree typically grows with a single trunk and can reach impressive heights of 13 to 16 feet or more under optimal conditions. In some cases, environmental factors might encourage a shorter, multi-stemmed growth pattern, giving gardeners some variety in how the tree might develop in their landscape.

Why Consider Planting Mesekui?

There are several compelling reasons why Pacific island gardeners might want to include mesekui in their landscapes:

  • Native heritage: You’ll be preserving and celebrating the natural plant heritage of your islands
  • Local adaptation: As a native species, it’s naturally suited to local climate conditions
  • Unique character: This isn’t a tree you’ll find in every garden center or neighborhood landscape
  • Conservation value: Growing native species helps maintain local biodiversity

The Growing Challenge

Here’s where things get interesting (and a bit challenging): mesekui is one of those native species that hasn’t made it into mainstream horticulture yet. This means detailed growing guides, propagation methods, and specific care instructions are quite limited.

What we do know is that as a Pacific Basin native, mesekui likely thrives in tropical conditions similar to other trees from Guam and Palau. This suggests it probably appreciates:

  • Warm, humid conditions year-round
  • Well-draining soil that doesn’t stay waterlogged
  • Protection from harsh winds, especially when young
  • Consistent moisture without being soggy

Finding and Growing Mesekui

The biggest challenge with mesekui isn’t growing it—it’s finding it! This tree isn’t commonly available through typical nursery channels. If you’re interested in adding mesekui to your landscape, you’ll likely need to:

  • Connect with local native plant societies or conservation groups
  • Reach out to botanical gardens in Guam or Palau
  • Work with local forestry departments or environmental agencies
  • Network with other native plant enthusiasts in your area

When you do find mesekui, treat it with the same care you’d give other tropical native trees. Start with good drainage, provide some protection from extreme weather while it establishes, and be patient as it finds its footing in your garden.

Is Mesekui Right for Your Garden?

Mesekui might be perfect for you if you’re gardening in Guam or Palau and you:

  • Value native species and local ecology
  • Enjoy growing unusual or rare plants
  • Have space for a medium to large tree
  • Don’t mind a bit of horticultural detective work
  • Want to contribute to native species conservation

However, mesekui might not be the best choice if you’re looking for a low-maintenance tree with well-documented care requirements, or if you need immediate availability from local nurseries.

The Bottom Line

Mesekui represents something special in the world of Pacific island gardening—a genuine native tree that connects your landscape directly to the natural heritage of Guam and Palau. While growing information may be limited, the opportunity to cultivate and preserve this native species makes it worth the extra effort for dedicated native plant gardeners.

If you’re up for a bit of an adventure and want to grow something truly meaningful to your local ecosystem, mesekui might just be the perfect addition to your native plant collection.

Mesekui

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

Myrtales

Family

Melastomataceae Juss. - Melastome family

Genus

Astronidium A. Gray

Species

Astronidium palauense (Kaneh.) Markgr. - mesekui

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