North America Native Plant

Swampforest Clermontia

Botanical name: Clermontia waimeae

USDA symbol: CLWA2

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Clermontia parviflora Gaudich. ex A. Gray var. calycina Rock (CLPAC)  âš˜  Clermontia waimeae Rock var. longisepala (CLWAL)  âš˜  Clermontia waimeae Rock var. obovata (CLWAO)   

Swampforest Clermontia: A Rare Hawaiian Native Worth Protecting Meet the swampforest clermontia (Clermontia waimeae), a botanical treasure that’s as rare as it is remarkable. Also known by its Hawaiian name ‘oha wai, this native Hawaiian shrub is one of those plants that makes you pause and appreciate the incredible diversity ...

Rare plant alert!

Region: Conservation status by state

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) ⚘

Swampforest Clermontia: A Rare Hawaiian Native Worth Protecting

Meet the swampforest clermontia (Clermontia waimeae), a botanical treasure that’s as rare as it is remarkable. Also known by its Hawaiian name ‘oha wai, this native Hawaiian shrub is one of those plants that makes you pause and appreciate the incredible diversity of island ecosystems. But before you start dreaming of adding this beauty to your garden, there’s something important you need to know about its conservation status.

A Critically Endangered Hawaiian Endemic

Here’s where things get serious: swampforest clermontia has a Global Conservation Status of S1, meaning it’s critically imperiled. With typically five or fewer occurrences and very few remaining individuals (fewer than 1,000), this plant is hanging on by a thread in the wild. Found only in Hawaii, this perennial shrub represents the kind of unique biodiversity that makes Hawaiian flora so special – and so vulnerable.

The plant grows exclusively in Hawaii’s wet forest ecosystems, where it has adapted to specific environmental conditions that are increasingly rare due to habitat loss and environmental pressures.

What Makes This Plant Special

Swampforest clermontia belongs to the bellflower family and shares the distinctive tubular flowers characteristic of Clermontia species. As a shrub, it’s a multi-stemmed woody plant that typically stays under 13-16 feet tall, though it can grow taller or develop a single stem depending on environmental conditions.

What’s particularly fascinating is its wetland status – it’s classified as facultative in Hawaii, meaning it can thrive in both wetland and non-wetland conditions. This adaptability likely helped it survive in Hawaii’s diverse microclimates, though it clearly prefers the moist, filtered light conditions of wet forests.

Should You Grow Swampforest Clermontia?

This is where responsible gardening becomes crucial. While we absolutely encourage growing native Hawaiian plants, swampforest clermontia’s critically imperiled status means you should only consider it if you can source it responsibly. Here’s what that means:

  • Work only with reputable native plant nurseries that propagate from legally obtained, cultivated stock
  • Never collect plants or seeds from wild populations
  • Consider participating in conservation efforts or supporting botanical gardens working to preserve this species
  • If you can’t find responsibly sourced plants, consider other native Hawaiian Clermontia species that are less endangered

Growing Conditions and Care

If you’re fortunate enough to source this plant responsibly, you’ll need to recreate its natural wet forest habitat. Think cool, moist, and protected – the kind of conditions you’d find under a canopy of native Hawaiian trees.

Swampforest clermontia thrives in:

  • High humidity environments
  • Filtered or dappled light (avoid direct, harsh sunlight)
  • Consistently moist, well-draining soil
  • USDA hardiness zones 10-12 (essentially tropical conditions)
  • Protection from strong winds

A Plant Worth Protecting

While we don’t have complete data on its specific wildlife benefits, Clermontia species are generally adapted for pollination by native Hawaiian birds. This means growing swampforest clermontia could potentially support native pollinator populations – another reason why conservation of this species matters.

The reality is that most gardeners won’t have the opportunity to grow this particular species, and that’s okay. What’s more important is understanding that plants like swampforest clermontia represent irreplaceable pieces of Hawaii’s natural heritage. By supporting conservation efforts, choosing other native alternatives, and spreading awareness about endangered plants, we can all play a role in protecting species like this one.

Sometimes the best way to appreciate a rare plant is to admire it from afar while working to ensure it has a future in the wild.

Swampforest Clermontia

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

Clermontia Gaudich. - clermontia

Species

Clermontia waimeae Rock - swampforest clermontia

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