Native Plants

Oahu Clermontia

Clermontia oblongifolia brevipes

USDA symbol: CLOBB

perennial shrub

Hawaii: native

Meet the Oahu clermontia (Clermontia oblongifolia brevipes), one of Hawaii’s most precious and endangered native plants. This remarkable shrub represents both the incredible biodiversity of the Hawaiian Islands and the urgent need for plant conservation. If you’re considering adding this beauty to your garden, there are some important things you ...

Oahu Clermontia may be listed as rare in your area.
Global Conservation Status

Status: S3T1 | Vulnerable: Found only in a restricted range (even if abundant at some locations). Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals.

United States

Status: Endangered | Endangered. In danger of extinction throughout all or a significant portion of its range.

Oahu Clermontia: A Rare Hawaiian Treasure Worth Protecting

Meet the Oahu clermontia (Clermontia oblongifolia brevipes), one of Hawaii’s most precious and endangered native plants. This remarkable shrub represents both the incredible biodiversity of the Hawaiian Islands and the urgent need for plant conservation. If you’re considering adding this beauty to your garden, there are some important things you need to know first.

What Makes This Plant Special?

The Oahu clermontia is a perennial shrub that’s exclusively native to Hawaii, making it a true island endemic. As a member of the bellflower family, this multi-stemmed woody plant typically grows less than 13-16 feet tall, though it can vary depending on environmental conditions. What makes it truly special, however, is its rarity – this plant is currently listed as Endangered, with a Global Conservation Status of S3T1.

Where Does It Come From?

This native Hawaiian beauty calls the island of Oahu home, where it has evolved over thousands of years to thrive in Hawaii’s unique ecosystem. Unfortunately, its natural habitat has become increasingly threatened, which is why you’ll rarely encounter this plant in the wild today.

  • Species observed
  • No observations

Should You Grow Oahu Clermontia?

Here’s where things get important: while the Oahu clermontia would make a fascinating addition to any Hawaiian native plant garden, its endangered status means you need to approach this plant with extreme care and responsibility. If you’re passionate about growing this rare beauty, here’s what you need to consider:

  • Only source responsibly: Never collect plants from the wild. Only obtain plants from reputable native plant nurseries or conservation programs
  • Support conservation efforts: Consider donating to or volunteering with Hawaiian plant conservation organizations instead
  • Choose alternatives: Consider other native Hawaiian Clermontia species that may be less threatened

Growing Conditions and Care

While specific growing information for this exact subspecies is limited due to its rarity, Clermontia plants generally prefer:

  • Hawaiian climate conditions (challenging to replicate elsewhere)
  • Well-draining soil with good organic content
  • Protection from harsh winds
  • Consistent moisture without waterlogging

Due to the plant’s endangered status and specific habitat requirements, successfully growing Oahu clermontia requires expertise in Hawaiian native plant cultivation and should ideally be undertaken as part of conservation efforts rather than casual gardening.

A Plant Worth Protecting

The Oahu clermontia serves as a powerful reminder of Hawaii’s unique natural heritage and the importance of plant conservation. While it may not be the easiest plant to add to your garden, supporting its conservation and learning about Hawaiian native plants can be incredibly rewarding.

If you’re passionate about Hawaiian native plants, consider connecting with local conservation groups, native plant societies, or botanical gardens. They often have programs where you can learn about and help protect rare species like the Oahu clermontia while discovering other beautiful Hawaiian natives that might be more suitable for home cultivation.

Remember, every plant conservation success story starts with people who care. Whether you end up growing this rare beauty or simply spreading awareness about its plight, you’re contributing to the preservation of Hawaii’s incredible botanical heritage.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Campanulales
Family: Campanulaceae Juss. - Bellflower family
Genus: Clermontia Gaudich. - clermontia

Species: Clermontia oblongifolia Gaudich. - Oahu clermontia

Subspecies: Clermontia oblongifolia Gaudich. ssp. brevipes (E. Wimm.) Lammers - Oahu clermontia

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