North America Native Plant

Kilauea Mauna Cyanea

Botanical name: Cyanea giffardii

USDA symbol: CYGI5

Life cycle: perennial

Habit: tree

Native status: Native to Hawaii  

Kilauea Mauna Cyanea: A Hawaiian Treasure on the Brink If you’re drawn to rare and extraordinary native plants, the Kilauea Mauna cyanea (Cyanea giffardii) represents one of Hawaii’s most precious botanical treasures. But before you start planning where to plant one, there’s something crucial you need to know about this ...

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 ⚘

Kilauea Mauna Cyanea: A Hawaiian Treasure on the Brink

If you’re drawn to rare and extraordinary native plants, the Kilauea Mauna cyanea (Cyanea giffardii) represents one of Hawaii’s most precious botanical treasures. But before you start planning where to plant one, there’s something crucial you need to know about this remarkable species.

A Plant Lost to Time?

The Kilauea Mauna cyanea carries a heartbreaking conservation status: Possibly Extirpated. This means that while scientists haven’t given up hope entirely, this native Hawaiian tree hasn’t been reliably spotted in the wild for years. It exists now primarily in historical records and the memories of botanists who once knew where to find it.

Where It Once Called Home

This endemic Hawaiian species was historically found only in Hawaii, living in the unique volcanic landscapes that make the islands so special. As its common name suggests, it was associated with the Kilauea region, thriving in the rich volcanic soils and humid conditions that characterize Hawaii’s native ecosystems.

What Made It Special

As a member of the bellflower family, the Kilauea Mauna cyanea was a true tree-form species, typically growing 13-16 feet tall with a single trunk. Like other members of the Cyanea genus, it likely produced stunning tubular flowers that evolved alongside Hawaii’s native bird pollinators. These perennial trees were living pieces of Hawaii’s evolutionary story, having developed in isolation over millions of years.

The Reality of Growing Kilauea Mauna Cyanea

Here’s the truth: You almost certainly cannot grow this plant. With its Possibly Extirpated status, finding legitimate plant material is nearly impossible. Even if you could locate seeds or cuttings, this species would require:

  • USDA hardiness zones 10-11 (tropical conditions only)
  • Specialized volcanic soil conditions
  • High humidity and specific moisture levels
  • Protection from wind and intense direct sunlight
  • Understanding of its complex ecological relationships

What You Can Do Instead

Rather than seeking out this critically rare species, consider supporting conservation efforts for Hawaiian native plants and choosing other native Cyanea species that are more readily available through legitimate conservation programs. If you’re passionate about Hawaiian natives, work with reputable native plant societies and botanical gardens.

If, by some miracle, you encounter what appears to be responsibly sourced material from this species, proceed only with verification from Hawaiian botanical experts and conservation organizations. The survival of species like the Kilauea Mauna cyanea depends on responsible stewardship, not casual cultivation.

A Living Reminder

The story of Cyanea giffardii serves as a powerful reminder of what we stand to lose when native ecosystems face pressure. While we may not be able to grow this particular treasure in our gardens, we can honor its memory by supporting native plant conservation and choosing other Hawaiian natives that still have a fighting chance.

Sometimes the most meaningful way to appreciate a rare plant is to ensure that others like it don’t follow the same path toward extinction.

Kilauea Mauna Cyanea

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Cyanea Gaudich. - cyanea

Species

Cyanea giffardii Rock - Kilauea Mauna cyanea

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