North America Native Plant

Kaala Stenogyne

Botanical name: Stenogyne kaalae kaalae

USDA symbol: STKAK

Life cycle: perennial

Habit: vine

Native status: Native to Hawaii  

Synonyms: Stenogyne kaalae Wawra var. latisepala Sherff (STKAL)   

Kaala Stenogyne: Hawaii’s Critically Rare Mountain Gem Meet one of Hawaii’s most elusive botanical treasures – the Kaala stenogyne (Stenogyne kaalae kaalae). This isn’t your typical garden center find, and for good reason. This remarkable little plant represents one of nature’s rarest gems, found only in the misty heights of ...

Rare plant alert!

Region: Conservation status by state

Status: S2T2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Kaala Stenogyne: Hawaii’s Critically Rare Mountain Gem

Meet one of Hawaii’s most elusive botanical treasures – the Kaala stenogyne (Stenogyne kaalae kaalae). This isn’t your typical garden center find, and for good reason. This remarkable little plant represents one of nature’s rarest gems, found only in the misty heights of Oahu’s Waianae Mountains.

A Plant on the Brink

Before we dive into the details, here’s something crucial every plant lover needs to know: Kaala stenogyne carries a Global Conservation Status of S2T2, which means it’s critically imperiled. This isn’t just uncommon – we’re talking about a plant species hanging on by a thread in the wild.

What Makes This Plant Special?

Kaala stenogyne is a perennial forb herb, which simply means it’s a non-woody plant that comes back year after year. Unlike the sturdy trees and shrubs that dominate much of Hawaii’s landscape, this delicate native belongs to the group of soft-stemmed plants that lack significant woody tissue above ground.

As a member of Hawaii’s unique native flora, this plant has evolved over thousands of years to thrive in very specific conditions that exist nowhere else on Earth.

Where in the World Can You Find It?

The Kaala stenogyne is endemic to Hawaii, meaning it naturally occurs nowhere else on the planet. Even within Hawaii, its range is incredibly limited – you’ll only find it in the wild on the island of Oahu, specifically in the Kaala area of the Waianae Mountains.

Should You Try Growing Kaala Stenogyne?

Here’s where things get serious. Due to its critically imperiled status, we strongly recommend against attempting to grow Kaala stenogyne unless you’re working with a legitimate conservation program. Here’s why:

  • Wild populations are extremely small and vulnerable
  • Removing plants from their natural habitat could push the species closer to extinction
  • The specific growing conditions this plant needs are not well understood
  • Conservation efforts should be left to botanical professionals and researchers

What We Don’t Know (And Why That Matters)

One of the most striking things about Kaala stenogyne is how much remains mysterious about its needs and habits. We don’t have detailed information about its preferred growing conditions, how it reproduces, what pollinators it depends on, or what wildlife benefits it provides. This knowledge gap isn’t just academic curiosity – it’s a conservation crisis.

When a plant is this rare, every individual matters, and understanding its ecology becomes crucial for species survival.

Supporting Conservation Instead

Rather than trying to grow this rare beauty yourself, consider these meaningful alternatives:

  • Support Hawaiian native plant conservation organizations
  • Choose other native Hawaiian plants that are more common and suitable for cultivation
  • Learn about and advocate for habitat protection in the Waianae Mountains
  • Visit botanical gardens that may have conservation programs for rare Hawaiian species

The Bigger Picture

Kaala stenogyne represents something larger than just one rare plant – it’s a symbol of Hawaii’s unique evolutionary heritage and the urgent need for conservation. Plants like this evolved in isolation over millions of years, creating species found nowhere else on Earth.

While you might not be able to grow this particular plant in your garden, you can still be part of Hawaii’s native plant story by choosing other indigenous species that are more readily available and better understood.

Sometimes the most meaningful way to appreciate a rare plant is to admire it from afar and work to ensure it has a future in its native home.

Kaala Stenogyne

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

Lamiales

Family

Lamiaceae Martinov - Mint family

Genus

Stenogyne Benth. - stenogyne

Species

Stenogyne kaalae Wawra - Kaala stenogyne

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