North America Native Plant

Haleakala Melicope

Botanical name: Melicope haleakalae

USDA symbol: MEHA7

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Pelea clusiifolia A. Gray var. minor H. St. John (PECLM)  âš˜  Pelea haleakalae B.C. Stone (PEHA14)   

Haleakala Melicope: A Rare Hawaiian Treasure for Your Native Garden If you’re passionate about Hawaiian native plants and conservation gardening, the Haleakala melicope (Melicope haleakalae) might just capture your heart. This endemic Hawaiian shrub is more than just a pretty face – it’s a living piece of Hawaii’s unique botanical ...

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) ⚘

Haleakala Melicope: A Rare Hawaiian Treasure for Your Native Garden

If you’re passionate about Hawaiian native plants and conservation gardening, the Haleakala melicope (Melicope haleakalae) might just capture your heart. This endemic Hawaiian shrub is more than just a pretty face – it’s a living piece of Hawaii’s unique botanical heritage that deserves a special place in native landscapes.

What Makes Haleakala Melicope Special?

The Haleakala melicope is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. What makes this plant truly remarkable is its exclusive Hawaiian heritage – you won’t find this beauty growing wild anywhere else on Earth.

This charming shrub produces clusters of small, delicate flowers ranging from white to pale yellow, creating a subtle but elegant display against its simple, opposite leaves. The flowers aren’t just pretty to look at – they’re magnets for Hawaii’s native pollinators, making this plant a valuable addition to any conservation-minded garden.

Where Does It Come From?

The Haleakala melicope is endemic to the Hawaiian island of Maui, where it naturally grows on the slopes of the magnificent Haleakala volcano. This volcanic environment has shaped the plant’s preferences and growing requirements over thousands of years.

Important Conservation Alert

Here’s something every gardener needs to know: the Haleakala melicope is classified as S2 – Imperiled. This means it’s extremely rare, with typically only 6-20 known locations and fewer than 1,000-3,000 individuals remaining in the wild. While we absolutely encourage growing this precious plant, it’s crucial to source it responsibly from reputable native plant nurseries or conservation programs – never collect from wild populations.

Is This Plant Right for Your Garden?

The Haleakala melicope is perfect for gardeners who:

  • Live in USDA hardiness zones 10-11
  • Want to support Hawaiian native plant conservation
  • Are creating authentic native Hawaiian landscapes
  • Appreciate subtle, natural beauty over flashy displays
  • Have well-draining soil and can provide proper growing conditions

This isn’t a plant for beginners or casual gardeners – it requires specific conditions and a commitment to conservation ethics.

Growing Conditions and Care

To successfully grow Haleakala melicope, you’ll need to recreate a bit of volcanic Hawaii in your garden:

  • Soil: Well-draining volcanic or sandy soil is essential
  • Light: Partial shade to full sun, depending on your local climate
  • Water: Moderate watering – avoid both drought stress and waterlogged conditions
  • Protection: Shield from strong winds that could damage the delicate branches
  • Climate: Tropical to subtropical conditions (zones 10-11)

Landscape Design Ideas

The Haleakala melicope works beautifully in:

  • Native Hawaiian plant collections
  • Conservation gardens
  • Botanical demonstration areas
  • Mixed native shrub borders
  • Educational landscapes showcasing endemic species

Supporting Conservation Through Gardening

By choosing to grow the Haleakala melicope, you’re not just adding a unique plant to your garden – you’re participating in conservation efforts to preserve Hawaii’s irreplaceable botanical heritage. Every garden that houses this rare species creates a genetic safety net and raises awareness about the importance of protecting endemic plants.

Remember, with great rarity comes great responsibility. Always purchase from ethical sources, never collect from wild populations, and consider sharing seeds or cuttings with other conservation-minded gardeners to help expand the cultivated population of this precious species.

The Bottom Line

The Haleakala melicope isn’t for every garden or every gardener, but for those who can provide the right conditions and share a passion for conservation, it offers the chance to nurture a truly irreplaceable piece of Hawaiian natural history. Just remember – with rarity comes responsibility, so always source your plants ethically and grow with conservation in mind.

Haleakala Melicope

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 haleakalae (B.C. Stone) T.G. Hartley & B.C. Stone - Haleakala melicope

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