North America Native Plant

Clermontia

Botanical name: Clermontia ×leptoclada

USDA symbol: CLLE3

Life cycle: perennial

Habit: tree

Native status: Native to Hawaii  

Synonyms: Clermontia leptoclada Rock var. holopsila E. Wimm. (CLLEH)  âš˜  Clermontia leptoclada Rock var. urceolata (CLLEU)   

Clermontia: A Rare Hawaiian Native Worth Protecting If you’re passionate about Hawaiian native plants and have been searching for something truly special for your garden, let me introduce you to clermontia (Clermontia ×leptoclada). This remarkable native Hawaiian species represents both the beauty and the challenges of growing endemic island plants. ...

Clermontia: A Rare Hawaiian Native Worth Protecting

If you’re passionate about Hawaiian native plants and have been searching for something truly special for your garden, let me introduce you to clermontia (Clermontia ×leptoclada). This remarkable native Hawaiian species represents both the beauty and the challenges of growing endemic island plants.

Meet This Hawaiian Endemic

Clermontia ×leptoclada is a perennial tree species that’s as rare as it is fascinating. The × in its name tells us something important – this is a hybrid species, meaning it naturally formed from the crossing of two other Clermontia species. Think of it as nature’s own botanical experiment, created in the unique ecosystems of Hawaii.

You might also encounter this plant listed under its botanical synonyms: Clermontia leptoclada Rock var. holopsila or Clermontia leptoclada Rock var. urceolata. But regardless of what you call it, this tree is 100% Hawaiian through and through.

Where You’ll Find Clermontia

This native beauty calls only Hawaii home – you won’t find it growing naturally anywhere else on Earth. That’s what makes it so special and, frankly, so challenging to grow outside its native range.

What Makes This Plant Special

As a tree species, Clermontia ×leptoclada typically grows taller than 13-16 feet, developing a single trunk under ideal conditions. However, like many island species, it can adapt to challenging environments by growing shorter or developing multiple stems when conditions aren’t perfect.

One particularly interesting characteristic is its flexible relationship with water. This plant has a facultative wetland status, which is a fancy way of saying it’s perfectly happy in both wet and drier conditions. It’s like the ultimate adaptable houseguest – comfortable wherever you put it, as long as the basic conditions are right.

Should You Grow Clermontia?

Here’s where I need to be completely honest with you: growing Clermontia ×leptoclada is not for the casual gardener. This is a plant for serious native Hawaiian plant enthusiasts who understand the challenges involved.

The Challenges:

  • Extremely limited availability – this is a rare hybrid species
  • Specific growing requirements that are difficult to replicate outside Hawaii
  • Limited research on cultivation techniques
  • May require specialized care and conditions

Why It’s Worth the Effort:

  • Supporting Hawaiian native plant conservation
  • Contributing to the preservation of unique island ecosystems
  • Growing something truly rare and special
  • Potential benefits for native Hawaiian wildlife (though specific benefits for this species aren’t well-documented)

Growing Conditions and Care

Unfortunately, specific growing information for Clermontia ×leptoclada is quite limited, which tells you something about how rare and specialized this plant is. What we do know is that as a Hawaiian native, it likely prefers:

  • Warm, tropical conditions year-round
  • Protection from harsh winds
  • Soil that drains well but retains some moisture
  • Partial shade to filtered sunlight

If you’re determined to grow this species, your best bet is to connect with Hawaiian native plant societies, botanical gardens, or conservation organizations that specialize in endemic Hawaiian flora.

The Bottom Line

Clermontia ×leptoclada is not your average garden center find. This is a plant for dedicated conservationists and serious collectors of Hawaiian native species. While it may not be the easiest addition to your garden, it represents something invaluable – a living piece of Hawaii’s unique natural heritage.

If you’re interested in supporting Hawaiian native plants but want something more accessible, consider reaching out to local native plant societies for recommendations of other Hawaiian species that might be easier to obtain and grow. Every native plant we can successfully cultivate and preserve is a win for biodiversity.

Remember: if you do find a source for this rare beauty, make sure it’s from responsibly collected or propagated stock. The last thing we want to do is put additional pressure on wild populations of an already rare species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Hawaii

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

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 ×leptoclada Rock (pro sp.) [drepanomorpha × kohalae] - clermontia

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