North America Native Plant

Wetforest Cyanea

Botanical name: Cyanea hamatiflora hamatiflora

USDA symbol: CYHAH

Life cycle: perennial

Habit: tree

Native status: Native to Hawaii  

Wetforest Cyanea: A Rare Hawaiian Treasure Worth Protecting If you’re passionate about native Hawaiian plants and conservation gardening, you might have heard whispers about the wetforest cyanea (Cyanea hamatiflora hamatiflora). This remarkable endemic species represents both the incredible beauty of Hawaii’s native flora and the urgent need for plant conservation ...

Rare plant alert!

Region: United States

Status: S1T1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Wetforest Cyanea: A Rare Hawaiian Treasure Worth Protecting

If you’re passionate about native Hawaiian plants and conservation gardening, you might have heard whispers about the wetforest cyanea (Cyanea hamatiflora hamatiflora). This remarkable endemic species represents both the incredible beauty of Hawaii’s native flora and the urgent need for plant conservation in our modern world.

What Makes Wetforest Cyanea Special?

The wetforest cyanea is a true Hawaiian original – a perennial tree that naturally grows in the misty, cool forests of the Big Island. This isn’t your typical backyard tree, though. Under ideal conditions, it can reach impressive heights of 13-16 feet or more, developing a distinctive single trunk that gives it real presence in the landscape.

What really sets this plant apart are its stunning curved flowers. As a member of the bellflower family, wetforest cyanea produces distinctive tubular blooms that evolved specifically to attract native Hawaiian honeycreepers – a relationship that speaks to the intricate web of Hawaii’s native ecosystems.

Where Does It Naturally Grow?

This species is found exclusively in Hawaii, making it a true island endemic. In the wild, you’ll find wetforest cyanea thriving in the cool, moist conditions of Hawaii’s native wet forests, where constant moisture and filtered sunlight create the perfect growing environment.

Important Conservation Status

Here’s what every gardener needs to know: Wetforest cyanea is listed as Endangered, with a Global Conservation Status of S1T1. This means it’s extremely rare and faces significant threats to its survival in the wild.

If you’re considering adding this plant to your garden, please ensure you source it only from reputable native plant nurseries or conservation programs that use responsibly collected seeds or cuttings. Never collect plants from the wild – this could further endanger wild populations.

Growing Wetforest Cyanea: What You Need to Know

This isn’t a plant for casual gardeners, but if you’re committed to native Hawaiian conservation and have the right conditions, it can be incredibly rewarding.

Ideal Growing Conditions

  • Climate: USDA Zones 10-11 (tropical and subtropical areas)
  • Light: Filtered sunlight or partial shade – think forest understory conditions
  • Moisture: Consistently moist soil and high humidity
  • Temperature: Cool, stable temperatures without extreme heat
  • Soil: Rich, organic, well-draining soil that mimics forest floor conditions

Care Tips for Success

  • Protect from strong winds and harsh direct sunlight
  • Maintain consistent soil moisture without waterlogging
  • Provide regular misting to increase humidity around the plant
  • Use organic mulch to keep roots cool and moist
  • Be patient – this is a slow-growing species that rewards long-term care

Why Grow Wetforest Cyanea?

Beyond its obvious beauty, growing wetforest cyanea is an act of conservation. By cultivating this endangered species in appropriate garden settings, you’re:

  • Supporting genetic diversity outside of wild populations
  • Raising awareness about Hawaiian native plant conservation
  • Creating habitat that could potentially support native pollinators
  • Participating in the preservation of Hawaii’s unique botanical heritage

Is This Plant Right for Your Garden?

Wetforest cyanea is definitely not for everyone. You’ll need:

  • A tropical or subtropical climate (Zones 10-11)
  • Ability to provide consistent moisture and humidity
  • Patience for slow growth
  • Commitment to conservation-minded gardening
  • Access to responsibly sourced plants

If you can provide these conditions and are passionate about native Hawaiian plants, wetforest cyanea could be an extraordinary addition to a specialized native garden or conservation landscape.

The Bottom Line

Wetforest cyanea represents both an opportunity and a responsibility. This endangered Hawaiian endemic offers gardeners a chance to participate in conservation while enjoying one of Hawaii’s most unique native trees. Just remember: if you choose to grow this rare beauty, make sure you’re doing so responsibly with properly sourced plants. Every plant we can successfully grow in cultivation is a small victory for conservation.

Wetforest 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 hamatiflora Rock - wetforest cyanea

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