North America Native Plant

Smallflower Delissea

Botanical name: Delissea parviflora

USDA symbol: DEPA9

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Smallflower Delissea: A Vanishing Jewel of Hawaii’s Native Flora Have you ever wondered about the plants that might be disappearing from our world? Meet the smallflower delissea (Delissea parviflora), a Hawaiian shrub that represents both the beauty and fragility of island ecosystems. This perennial member of the bellflower family tells ...

Rare plant alert!

Region: Conservation status by state

Status: SH: Status is uncertain but is somewhere between the following rankings: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘

Smallflower Delissea: A Vanishing Jewel of Hawaii’s Native Flora

Have you ever wondered about the plants that might be disappearing from our world? Meet the smallflower delissea (Delissea parviflora), a Hawaiian shrub that represents both the beauty and fragility of island ecosystems. This perennial member of the bellflower family tells a compelling story about conservation and the race against time to preserve our native plant heritage.

What Makes Smallflower Delissea Special

Smallflower delissea is a multi-stemmed woody shrub that typically grows less than 13-16 feet tall. Like other shrubs, it usually develops several stems arising from or near the ground, creating a naturally bushy appearance. As a member of the Campanulaceae family, it likely produces small, tubular flowers characteristic of Hawaiian bellflowers.

Where Does It Call Home?

This remarkable plant is endemic to Hawaii, meaning it exists nowhere else on Earth naturally. Historically, smallflower delissea grew on the Hawaiian islands, adapted to the unique climate and conditions of these Pacific paradises.

A Critical Conservation Alert

Here’s where the story takes a sobering turn. Smallflower delissea has a Global Conservation Status of SH, which means it’s Possibly Extirpated. In plain English, this plant is known only from historical records, and scientists haven’t been able to find living specimens in recent years. While there’s still hope for rediscovery, this plant teeters on the edge of extinction.

Should You Plant Smallflower Delissea?

Given its extremely rare status, smallflower delissea isn’t something you’ll find at your local garden center – and that’s probably for the best. If you’re passionate about Hawaiian native plants and conservation, here’s what you should know:

  • Only source from conservation programs: If seeds or plants ever become available, they should only come from legitimate botanical conservation efforts
  • Support research efforts: Consider supporting organizations working to rediscover and preserve Hawaiian endemic plants
  • Choose alternative natives: Plant other Hawaiian native species that are more readily available and less threatened

Growing Conditions (If Ever Available)

Should smallflower delissea ever be recovered and made available through conservation programs, it would likely thrive in:

  • USDA hardiness zones 10-12 (tropical conditions)
  • Conditions similar to Hawaiian forest understory
  • Warm, humid environments with protection from harsh winds
  • Well-draining soil that mimics its native habitat

The Bigger Picture

While you probably can’t grow smallflower delissea in your garden, its story serves as a powerful reminder of why native plant conservation matters. Hawaii has lost many of its endemic species to habitat destruction, invasive plants, and climate change. By choosing to plant other available Hawaiian natives (if you live in appropriate zones) or supporting your local native plants wherever you are, you’re part of the solution.

The smallflower delissea may be a ghost from Hawaii’s botanical past, but its legacy can inspire us to protect the native plants we still have time to save. Every native plant we choose to grow is a small act of conservation, a way of keeping our natural heritage alive for future generations to discover and enjoy.

Smallflower Delissea

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

Delissea Gaudich. - delissea

Species

Delissea parviflora Hillebr. - smallflower delissea

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