North America Native Plant

Cloudswept Colicwood

Botanical name: Myrsine juddii

USDA symbol: MYJU

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Cloudswept Colicwood: Hawaii’s Critically Endangered Native Treasure Meet one of Hawaii’s rarest botanical gems – the cloudswept colicwood (Myrsine juddii). This isn’t your typical garden center find, and for good reason. This remarkable native Hawaiian shrub represents both the beauty and fragility of our island ecosystems. What Makes Cloudswept Colicwood ...

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

Cloudswept Colicwood: Hawaii’s Critically Endangered Native Treasure

Meet one of Hawaii’s rarest botanical gems – the cloudswept colicwood (Myrsine juddii). This isn’t your typical garden center find, and for good reason. This remarkable native Hawaiian shrub represents both the beauty and fragility of our island ecosystems.

What Makes Cloudswept Colicwood Special?

Cloudswept colicwood is a perennial, multi-stemmed woody shrub that typically grows less than 13-16 feet tall. True to its common name, this plant thrives in the misty, cloud-swept environments of Hawaii’s high-elevation forests, where it has evolved to capture moisture directly from the air.

As an endemic Hawaiian species, cloudswept colicwood is found nowhere else on Earth. It grows exclusively in Hawaii, making it a true testament to the islands’ unique evolutionary history.

A Plant in Crisis

Here’s where things get serious, fellow plant lovers. Cloudswept colicwood has a Global Conservation Status of S1, meaning it’s critically imperiled. In the United States, it’s classified as Endangered. With typically five or fewer occurrences and very few remaining individuals (less than 1,000), this species is hanging by a thread.

This rarity status means that if you’re considering adding this plant to your collection, you absolutely must source it responsibly from legitimate conservation programs or authorized nurseries – never from wild populations.

Growing Conditions and Habitat

Cloudswept colicwood has very specific habitat requirements that make it challenging to grow outside its natural environment:

  • Prefers cool, moist conditions typical of cloud forests
  • Thrives in USDA hardiness zones 10-11, but requires very specific microclimates
  • Has a Facultative Wetland status in Hawaii, meaning it usually occurs in wetlands but can occasionally be found in non-wetland areas
  • Needs consistently high humidity and frequent fog or mist

Should You Grow Cloudswept Colicwood?

This is where we need to have an honest conversation. While cloudswept colicwood would be a meaningful addition to any native Hawaiian plant collection, it’s extremely difficult to cultivate successfully. The plant’s specific requirements for cool, misty conditions make it unsuitable for most home gardens, even in Hawaii.

If you’re passionate about Hawaiian native plants and have experience with challenging species, consider supporting conservation efforts instead of attempting cultivation. Many botanical gardens and conservation organizations are working to protect and propagate this species professionally.

Conservation and Responsible Gardening

For most gardeners interested in Hawaiian natives, consider these more readily available alternatives that won’t put pressure on endangered populations:

  • Other Myrsine species that are less threatened
  • Native Hawaiian shrubs adapted to your specific growing conditions
  • Supporting conservation organizations working to protect cloudswept colicwood habitat

The Bigger Picture

Cloudswept colicwood serves as a reminder of what we stand to lose when native habitats disappear. While it may not be practical for home cultivation, understanding and appreciating these rare species helps us become better stewards of our native plant communities.

If you’re lucky enough to encounter cloudswept colicwood in its natural habitat during a visit to Hawaii’s high-elevation forests, take a moment to appreciate this living relic. Just remember – look but don’t touch, and certainly don’t collect. These plants need every individual they can get to survive for future generations.

Sometimes the best way to grow a rare plant is to protect the wild spaces where it belongs.

Cloudswept Colicwood

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

Primulales

Family

Myrsinaceae R. Br. - Myrsine family

Genus

Myrsine L. - colicwood

Species

Myrsine juddii Hosaka - cloudswept colicwood

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