North America Native Plant

Maui Hau Kuahiwi

Botanical name: Hibiscadelphus wilderianus

USDA symbol: HIWI

Life cycle: perennial

Habit: tree

Native status: Native to Hawaii  

Maui Hau Kuahiwi: A Ghost Tree of Hawaiian Forests Meet the Maui hau kuahiwi (Hibiscadelphus wilderianus), one of Hawaii’s most mysterious and heartbreaking botanical stories. This native Hawaiian tree holds the somber distinction of being possibly extinct in the wild, making it more of a botanical legend than a garden ...

Rare plant alert!

Region: Conservation status by state

Status: SH: Status is uncertain but is somewhere between the following rankings: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘

Maui Hau Kuahiwi: A Ghost Tree of Hawaiian Forests

Meet the Maui hau kuahiwi (Hibiscadelphus wilderianus), one of Hawaii’s most mysterious and heartbreaking botanical stories. This native Hawaiian tree holds the somber distinction of being possibly extinct in the wild, making it more of a botanical legend than a garden possibility for most of us.

What Makes This Tree Special

The Maui hau kuahiwi was once a magnificent perennial tree, typically growing over 13-16 feet tall with a single, sturdy trunk. Like other members of the hibiscus family, it likely produced beautiful flowers that would have been right at home in any tropical paradise. Its large, heart-shaped leaves would have created lovely dappled shade in Hawaii’s native forests.

Where It Once Called Home

This remarkable tree was endemic to the island of Maui in Hawaii, where it historically grew in the dry to mesic (moderately moist) forests at mid-elevations. These unique Hawaiian ecosystems provided the perfect conditions for this special species to thrive for countless generations.

The Hard Truth About Growing Maui Hau Kuahiwi

Here’s the reality check: You almost certainly cannot and should not attempt to grow this tree. The Maui hau kuahiwi has a Global Conservation Status of SH, meaning it’s Possibly Extirpated. In plain English? Scientists know it only from historical records, and while there’s still hope someone might rediscover it growing wild somewhere on Maui, no one has seen it in its natural habitat for years.

Why This Matters for Native Plant Enthusiasts

The story of Maui hau kuahiwi serves as a powerful reminder of what we can lose when native ecosystems face pressure from development, invasive species, and climate change. If you’re passionate about Hawaiian native plants, this tree’s plight highlights why supporting conservation efforts and choosing other native Hawaiian species for your garden is so crucial.

Better Alternatives for Your Hawaiian Native Garden

If you’re gardening in Hawaii and want to support native biodiversity, consider these alternatives that can actually thrive in cultivation:

  • Other native hibiscus species that aren’t critically endangered
  • Native koa trees for larger landscapes
  • Ohia lehua for dramatic flowering displays
  • Native loulu palms for tropical appeal

How You Can Help

While you can’t grow Maui hau kuahiwi in your backyard, you can:

  • Support Hawaiian native plant conservation organizations
  • Choose other native Hawaiian plants for your landscape
  • Learn about and protect existing native Hawaiian ecosystems
  • Spread awareness about Hawaii’s unique and threatened flora

The Maui hau kuahiwi may be gone from our gardens, but its story reminds us why every native plant we can successfully grow and protect matters. In a world where we’re losing species faster than we can study them, every thriving native garden becomes a small act of conservation hope.

Maui Hau Kuahiwi

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Malvales

Family

Malvaceae Juss. - Mallow family

Genus

Hibiscadelphus Rock - hibiscadelphus

Species

Hibiscadelphus wilderianus Rock - Maui hau kuahiwi

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