North America Native Plant

Hawai’i Hala Pepe

Botanical name: Pleomele hawaiiensis

USDA symbol: PLHA4

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Hawai’i Hala Pepe: A Critically Endangered Hawaiian Treasure Meet one of Hawaii’s rarest botanical gems – the Hawai’i hala pepe (Pleomele hawaiiensis). This little-known native Hawaiian subshrub represents both the incredible diversity of island flora and the urgent need for plant conservation. While most gardeners will never encounter this species, ...

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

Hawai’i Hala Pepe: A Critically Endangered Hawaiian Treasure

Meet one of Hawaii’s rarest botanical gems – the Hawai’i hala pepe (Pleomele hawaiiensis). This little-known native Hawaiian subshrub represents both the incredible diversity of island flora and the urgent need for plant conservation. While most gardeners will never encounter this species, understanding its story helps us appreciate the delicate balance of native ecosystems.

What Makes This Plant Special

Hawai’i hala pepe is a perennial subshrub that stays refreshingly compact, typically growing less than 1.5 feet tall and never exceeding 3 feet at maturity. This low-growing habit makes it quite different from many other Hawaiian native plants, giving it a unique niche in its natural habitat.

As a member of Hawaii’s endemic flora, this species evolved in isolation over millions of years, developing characteristics found nowhere else on Earth. Unfortunately, what makes it special also makes it incredibly vulnerable.

Where Does It Grow?

Hawai’i hala pepe is found exclusively in Hawaii, where it clings to existence in just a few remaining locations. Its natural range has been severely reduced over time due to habitat loss and other environmental pressures.

Conservation Status: A Sobering Reality

Here’s where things get serious. Hawai’i hala pepe carries a Global Conservation Status of S1, meaning it’s critically imperiled. In plain terms, this means there are typically five or fewer known populations, with fewer than 1,000 individual plants remaining in the wild. It’s also listed as Endangered under federal protection.

This isn’t just another rare plant – it’s teetering on the edge of extinction.

Should You Try to Grow It?

The short answer is: probably not, and definitely not without extreme caution. Here’s why:

  • Plant material is essentially unavailable through normal nursery channels
  • Any existing plants are likely part of conservation efforts
  • Growing conditions and care requirements are not well-documented
  • Collecting from wild populations could contribute to its extinction

If you’re passionate about Hawaiian native plants and somehow encounter Hawai’i hala pepe through legitimate conservation programs, only proceed with responsibly sourced material and proper permits. This means working with established botanical gardens, conservation organizations, or research institutions.

What We Don’t Know

Because of its extreme rarity, many details about Hawai’i hala pepe remain mysteries:

  • Specific growing conditions and soil preferences
  • Propagation methods
  • Pollinator relationships
  • Detailed care requirements
  • Landscape applications

This knowledge gap itself highlights how urgent conservation efforts are – we’re at risk of losing species before we even fully understand them.

Supporting Conservation Instead

Rather than trying to grow this endangered species, consider these meaningful alternatives:

  • Support Hawaiian native plant conservation organizations
  • Grow other native Hawaiian plants that are more readily available
  • Learn about and advocate for habitat protection
  • Visit botanical gardens with Hawaiian conservation programs

The Bigger Picture

Hawai’i hala pepe serves as a powerful reminder that not every plant is meant for our gardens – sometimes the most important thing we can do is protect what little remains in the wild. Its story underscores the critical importance of habitat conservation and the urgent need to protect Hawaii’s unique endemic flora before it’s too late.

While you may never grow this particular species, understanding its plight can inspire more thoughtful choices about native plants in your own region. Every garden can be a small step toward supporting biodiversity, even if it doesn’t include the rarest species on Earth.

Hawai’i Hala Pepe

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Pleomele Salisb. - hala pepe

Species

Pleomele hawaiiensis O. Deg. & I. Deg. - Hawai'i hala pepe

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