North America Native Plant

Kolekole Cyanea

Botanical name: Cyanea kolekoleensis

USDA symbol: CYKO3

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Delissea kolekoleensis H. St. John (DEKO2)   

Kolekole Cyanea: A Rare Hawaiian Treasure Worth Protecting If you’re passionate about native Hawaiian plants, you’ve probably heard whispers about the kolekole cyanea (Cyanea kolekoleensis) – and for good reason. This extraordinary shrub represents one of Hawaii’s most precious botanical gems, though sadly, it’s also one of its most endangered. ...

Rare plant alert!

Region: United States

Status: S1: 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) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Kolekole Cyanea: A Rare Hawaiian Treasure Worth Protecting

If you’re passionate about native Hawaiian plants, you’ve probably heard whispers about the kolekole cyanea (Cyanea kolekoleensis) – and for good reason. This extraordinary shrub represents one of Hawaii’s most precious botanical gems, though sadly, it’s also one of its most endangered.

What Makes Kolekole Cyanea Special

The kolekole cyanea belongs to the bellflower family and showcases the unique beauty that makes Hawaiian flora so captivating. As a perennial shrub, it typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. What sets this plant apart isn’t just its rarity – it’s a living piece of Hawaii’s natural heritage that has evolved nowhere else on Earth.

You might also see this plant referred to by its scientific synonym, Delissea kolekoleensis, in older botanical references.

Where Does It Come From

This remarkable shrub is endemic to Hawaii, meaning it exists naturally nowhere else in the world. Within Hawaii, its distribution is extremely limited, making every single plant incredibly precious to the islands’ ecosystem.

A Critical Conservation Concern

Here’s what every gardener needs to know: The kolekole cyanea carries a Global Conservation Status of S1, which translates to Critically Imperiled. In plain terms, this means there are typically five or fewer occurrences of this plant in the wild, with fewer than 1,000 individual plants remaining. It’s also listed as Endangered in the United States.

If you’re considering adding this plant to your garden, please – and we cannot stress this enough – only source it from reputable native plant nurseries that propagate from legally obtained, responsibly sourced material. Never collect from wild populations.

Growing Conditions and Care

Should you be fortunate enough to obtain responsibly sourced kolekole cyanea, here’s what you need to know about keeping it happy:

  • Climate: Thrives in USDA hardiness zones 10-12 (tropical conditions only)
  • Moisture: Prefers consistent moisture but not waterlogged conditions – it’s classified as Facultative Upland, meaning it usually grows in non-wetland areas but can tolerate some wetness
  • Light: Likely prefers partial shade, mimicking its natural forest habitat
  • Soil: Well-draining soil is essential to prevent root rot

Garden Role and Landscape Use

The kolekole cyanea isn’t your typical landscape plant. Its primary value lies in conservation gardens, specialized native Hawaiian plant collections, and educational displays. If you’re creating a native Hawaiian garden or participating in conservation efforts, this shrub can serve as a stunning focal point while contributing to species preservation.

This plant is best suited for:

  • Conservation gardens
  • Native Hawaiian plant collections
  • Educational botanical displays
  • Specialized tropical gardens focused on rare species

Supporting Hawaiian Wildlife

As a native Hawaiian species, the kolekole cyanea likely plays important roles in supporting local wildlife, particularly native birds and insects that have co-evolved with Hawaiian flora. By growing this plant responsibly, you’re not just adding beauty to your garden – you’re participating in conservation efforts that support entire ecosystems.

The Bottom Line

The kolekole cyanea represents both an incredible opportunity and a serious responsibility. While its rarity makes it a challenging plant to obtain and grow, those who do so ethically become partners in conservation. If you’re not ready for the commitment that comes with growing an endangered species, consider supporting conservation organizations working to protect Hawaiian native plants instead.

Remember: every kolekole cyanea in cultivation represents hope for this species’ future. With careful, responsible growing practices, we can help ensure that future generations will have the chance to appreciate this remarkable Hawaiian treasure.

Kolekole 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 kolekoleensis (H. St. John) Lammers - kolekole cyanea

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