North America Native Plant

Maui Pilo Kea

Botanical name: Platydesma spathulata

USDA symbol: PLSP3

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Platydesma spathulata (A. Gray) B.C. Stone var. pallida (Hillebr.) B.C. Stone (PLSPP)  âš˜  Platydesma spathulata (A. Gray) B.C. Stone var. pubescens (Skottsb.) B.C. Stone (PLSPP2)   

Maui Pilo Kea: A Rare Hawaiian Treasure Worth Protecting Meet the Maui pilo kea (Platydesma spathulata), one of Hawaii’s most precious and elusive native plants. This little-known shrub represents the incredible botanical diversity that makes the Hawaiian Islands so special – and why conservation efforts are more important than ever. ...

Rare plant alert!

Region: Conservation status by state

Status: S2S3: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Maui Pilo Kea: A Rare Hawaiian Treasure Worth Protecting

Meet the Maui pilo kea (Platydesma spathulata), one of Hawaii’s most precious and elusive native plants. This little-known shrub represents the incredible botanical diversity that makes the Hawaiian Islands so special – and why conservation efforts are more important than ever.

What Makes Maui Pilo Kea Special?

The Maui pilo kea is a perennial shrub that’s found exclusively in Hawaii, making it a true island endemic. As a multi-stemmed woody plant, it typically grows less than 13-16 feet tall with several stems arising from near the ground. This native beauty belongs to a group of plants that have evolved nowhere else on Earth.

Where Does It Call Home?

This rare Hawaiian native is found only in Hawaii, with its natural habitat centered on the island of Maui. In the wild, you’ll find it growing in dry to mesic (moderately moist) forest conditions, where it has adapted to the unique climate and soil conditions of its island home.

A Plant That Needs Our Help

Important Conservation Note: Maui pilo kea has a Global Conservation Status of S2S3, which indicates it’s critically imperiled to vulnerable. This means the species faces a high to moderate risk of extinction due to restricted range, few populations, or other factors.

If you’re interested in growing this remarkable plant, it’s crucial to obtain material only from responsible, conservation-minded sources. Never collect from wild populations, as this could further threaten this already vulnerable species.

Growing Conditions and Care

For those committed to conservation gardening, here’s what Maui pilo kea needs to thrive:

  • Climate: USDA hardiness zones 10-11 (tropical conditions)
  • Soil: Well-draining soils that mimic its natural forest habitat
  • Moisture: Moderate moisture levels (it has a facultative wetland status, meaning it can grow in both wet and dry conditions)
  • Setting: Best suited for botanical gardens, conservation collections, or specialized native plant gardens

Why Consider This Plant?

While Maui pilo kea isn’t your typical garden center find, it offers something invaluable to conservation-minded gardeners:

  • A direct connection to Hawaii’s unique evolutionary history
  • The opportunity to participate in plant conservation
  • Educational value about Hawaiian native ecosystems
  • A conversation starter about the importance of protecting rare species

The Bottom Line

Maui pilo kea represents both the wonder and fragility of Hawaii’s native plant communities. While it’s not a plant for every garden, it serves as an important reminder of what we stand to lose if we don’t actively work to protect our native species.

If you’re passionate about Hawaiian conservation and have the proper resources and expertise, growing Maui pilo kea from responsibly sourced material can be a meaningful way to contribute to its preservation. For most gardeners, supporting organizations that work to protect this and other rare Hawaiian natives is equally valuable.

Remember: every native plant we protect today is a gift we give to future generations. The Maui pilo kea may be small and rare, but its story is part of the larger narrative of Hawaii’s incredible natural heritage.

Maui Pilo Kea

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

Sapindales

Family

Rutaceae Juss. - Rue family

Genus

Platydesma H. Mann - platydesma

Species

Platydesma spathulata (A. Gray) B.C. Stone - Maui pilo kea

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