North America Native Plant

Alani Wai

Botanical name: Melicope waialealae

USDA symbol: MEWA2

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Pelea waialealae Wawra (PEWA4)  âš˜  Pelea waialealae Wawra var. latior H. St. John & Hume (PEWAL)  âš˜  Pelea waialealae Wawra var. pubescens Skottsb. (PEWAP)   

Alani Wai: A Rare Hawaiian Treasure Worth Protecting Meet the alani wai (Melicope waialealae), one of Hawaii’s most precious and endangered native plants. This remarkable shrub tells a story of resilience, rarity, and the delicate balance of island ecosystems. While you might be drawn to add this unique Hawaiian native ...

Rare plant alert!

Region: Conservation status by state

Status: S2: 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) ⚘

Alani Wai: A Rare Hawaiian Treasure Worth Protecting

Meet the alani wai (Melicope waialealae), one of Hawaii’s most precious and endangered native plants. This remarkable shrub tells a story of resilience, rarity, and the delicate balance of island ecosystems. While you might be drawn to add this unique Hawaiian native to your garden, there’s more to this plant’s story that every gardener should know.

A Plant with Many Names

Scientifically known as Melicope waialealae, this plant goes by the beautiful Hawaiian name alani wai. You might also encounter it in older botanical references under its former names, including Pelea waialealae. These name changes reflect our evolving understanding of Hawaiian flora and the plant’s proper taxonomic placement.

Where Does Alani Wai Call Home?

This perennial shrub is exclusively native to Hawaii, specifically found on the island of Kauai. It grows only in the wettest places on Earth – the cloud forests around Mount Wai’ale’ale, which receives over 400 inches of rainfall annually. Talk about loving your moisture!

What Makes This Plant Special

Alani wai is classified as an obligate wetland plant, meaning it almost always occurs in wetland environments. As a multi-stemmed shrub, it typically reaches heights of 13-16 feet, though it can grow taller under ideal conditions. Its several stems arise from near the ground, creating a bushy, naturalistic appearance that fits perfectly into Hawaii’s lush landscape.

The Conservation Reality Check

Here’s where we need to have an important conversation. Alani wai carries a Global Conservation Status of S2, which means it’s imperiled due to extreme rarity. We’re talking about only 6-20 known occurrences in the wild, with fewer than 1,000-3,000 individual plants remaining. This makes it incredibly vulnerable to extinction.

Should You Plant Alani Wai?

While the idea of growing this unique Hawaiian native might be appealing, we strongly recommend against planting alani wai unless you’re working with conservation specialists and responsibly sourced material. Here’s why:

  • Its extreme rarity makes wild collection devastating to remaining populations
  • It requires very specific wetland conditions that are difficult to replicate
  • It’s adapted to high-elevation cloud forest environments
  • Conservation efforts should take priority over home gardening

Better Alternatives for Your Hawaiian Garden

Instead of alani wai, consider these more common native Hawaiian Melicope species that can provide similar aesthetic value without conservation concerns:

  • Alani (Melicope clusiifolia) – more readily available
  • Mokihana (Melicope anisata) – Kauai’s official lei plant
  • Other native Hawaiian shrubs suited to your specific island and elevation

Growing Conditions (For Conservation Specialists Only)

If you’re involved in legitimate conservation efforts, alani wai requires:

  • Obligate wetland conditions with consistent moisture
  • High humidity and cloud forest environment
  • USDA hardiness zones 10-11 (tropical conditions)
  • Protection from direct sunlight and wind
  • Specialized care from experienced native plant specialists

How You Can Help

Rather than trying to grow alani wai, here’s how you can support this incredible species:

  • Support Hawaiian native plant conservation organizations
  • Choose other native Hawaiian plants for your landscape
  • Learn about and share awareness of Hawaii’s endangered flora
  • Participate in habitat restoration projects if you’re in Hawaii

The Bigger Picture

Alani wai represents the unique evolutionary story of Hawaiian islands – plants that evolved in isolation and developed into species found nowhere else on Earth. While we can’t recommend growing this rare treasure in home gardens, we can appreciate its role in Hawaii’s natural heritage and work to ensure future generations will still be able to marvel at its existence in the wild.

Sometimes the best way to love a plant is to let it thrive where it belongs, protected and preserved for the future. That’s the real gift we can give to alani wai and Hawaii’s incredible botanical legacy.

Alani Wai

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

Melicope (J.R. Forst. & G. Forst.) T.G. Hartley & B.C. Stone - melicope

Species

Melicope waialealae (Wawra) T.G. Hartley & B.C. Stone - alani wai

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