Native Plants

Lava Hau Kuahiwi

Hibiscadelphus crucibracteatus

USDA symbol: HICR

perennial tree

Hawaii: native

Sometimes in the world of native gardening, we encounter plants that serve as poignant reminders of what we’ve lost. The lava hau kuahiwi (Hibiscadelphus crucibracteatus) is one such plant – a Hawaiian endemic that may have already slipped away from us forever. Lava hau kuahiwi was a perennial tree species ...

Lava Hau Kuahiwi may be listed as rare in your area.
Global Conservation Status

Status: SH | Possibly extinct: Known only from historical occurrences but still some hope of rediscovery.

Lava Hau Kuahiwi: A Lost Hawaiian Treasure

Sometimes in the world of native gardening, we encounter plants that serve as poignant reminders of what we’ve lost. The lava hau kuahiwi (Hibiscadelphus crucibracteatus) is one such plant – a Hawaiian endemic that may have already slipped away from us forever.

What is Lava Hau Kuahiwi?

Lava hau kuahiwi was a perennial tree species that belonged to Hawaii’s unique flora. As a member of the mallow family, this woody plant would have grown as a single-stemmed tree, typically reaching heights greater than 13-16 feet under normal conditions. Like many Hawaiian natives, it represented millions of years of isolated evolution, developing characteristics found nowhere else on Earth.

Where Did It Call Home?

This remarkable tree was endemic to Hawaii, meaning it evolved specifically in the Hawaiian Islands and existed nowhere else in the world. Its distribution was limited to the Big Island, where it historically grew in the island’s diverse forest ecosystems.

  • Species observed
  • No observations

A Conservation Crisis

Here’s where the story takes a sobering turn. Lava hau kuahiwi carries a Global Conservation Status of SH, which stands for Possibly Extirpated. In conservation terms, this means the species is known only from historical records, with no confirmed living specimens found in recent surveys. While scientists hold out some hope for rediscovery, it’s possible that lava hau kuahiwi has already joined the growing list of Hawaiian plants lost to extinction.

Why This Matters for Gardeners

You might wonder why we’re discussing a plant you can’t actually grow. The story of lava hau kuahiwi serves several important purposes:

  • Conservation Awareness: It highlights the fragility of Hawaii’s native ecosystems
  • Historical Record: Documenting lost species helps us understand what we’re fighting to protect
  • Inspiration for Action: Learning about extinct species can motivate us to protect those that remain

What Gardeners Can Do Instead

While you can’t plant lava hau kuahiwi in your garden, you can make a difference by:

  • Supporting organizations working to protect Hawaiian native plants
  • Growing other native Hawaiian species that are still available
  • Participating in habitat restoration projects
  • Spreading awareness about the importance of native plant conservation

Learning from Loss

The possible extinction of lava hau kuahiwi reminds us that every native species in our gardens represents a victory for conservation. When we choose native plants, we’re not just creating beautiful landscapes – we’re providing refuge for species that might otherwise follow the same path as this lost Hawaiian treasure.

While we may never see lava hau kuahiwi gracing our gardens, its story can inspire us to be better stewards of the native plants that remain. Every native garden becomes a small act of conservation, a testament to our commitment to preserving the irreplaceable natural heritage of our regions.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Dilleniidae
Order: Malvales
Family: Malvaceae Juss. - Mallow family
Genus: Hibiscadelphus Rock - hibiscadelphus

Species: Hibiscadelphus crucibracteatus Hobdy - lava 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