North America Native Plant

Loulu

Botanical name: Coniogramme pilosa

USDA symbol: COPI3

Life cycle: perennial

Habit: forb

Native status: Native to Hawaii  

Loulu: Hawaii’s Mysterious Native Fern Worth Protecting If you’re a gardener with a passion for Hawaii’s unique native plants, you might have stumbled across the intriguing Coniogramme pilosa, commonly known as loulu. This perennial native fern holds a special place in Hawaii’s botanical landscape, though it’s not one you’ll easily ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Loulu: Hawaii’s Mysterious Native Fern Worth Protecting

If you’re a gardener with a passion for Hawaii’s unique native plants, you might have stumbled across the intriguing Coniogramme pilosa, commonly known as loulu. This perennial native fern holds a special place in Hawaii’s botanical landscape, though it’s not one you’ll easily find at your local garden center – and there’s a very good reason for that.

What Makes This Plant Special?

Coniogramme pilosa is a fascinating example of Hawaii’s endemic flora. As a forb-type plant, it’s a vascular species without significant woody tissue, meaning it maintains a softer, more herbaceous structure throughout its life. This perennial beauty represents the incredible diversity that makes Hawaiian native gardening so rewarding.

Where You’ll Find It Growing Wild

This native Hawaiian species calls the islands home exclusively, making it a true endemic treasure. You won’t find Coniogramme pilosa growing naturally anywhere else in the world – it’s as Hawaiian as it gets!

A Plant That Needs Our Protection

Here’s where things get serious, fellow gardeners. Coniogramme pilosa carries a Global Conservation Status of S3, which translates to Vulnerable. This means the species faces real risks in the wild, with typically only 21 to 100 occurrences or between 3,000 and 10,000 individuals remaining. That’s not a huge number when you think about it!

What this means for gardeners: If you’re interested in growing this plant, you absolutely must source it responsibly. Only obtain plants or seeds from reputable native plant societies, botanical gardens, or conservation programs that propagate from ethical sources. Never collect from the wild – doing so could push this vulnerable species closer to extinction.

Garden Habitat Preferences

Coniogramme pilosa has earned a Facultative Upland wetland status in Hawaii, which is garden-speak for pretty flexible. This means it usually prefers drier, upland conditions but can tolerate some moisture if needed. Think of it as the adaptable friend in your garden who’s happy in most situations but definitely has preferences.

Why Consider This Plant for Your Hawaiian Garden?

If you’re committed to authentic Hawaiian native landscaping and can source this plant responsibly, here’s why it might deserve a spot in your garden:

  • True Hawaiian endemic – you’re supporting genuine local biodiversity
  • Perennial nature means it’s a long-term garden investment
  • Adaptable to various moisture conditions
  • Part of Hawaii’s irreplaceable natural heritage

The Reality Check

Let’s be honest – this isn’t a plant for casual gardeners or those looking for easy-to-find options. The combination of its vulnerable conservation status and limited availability means it’s really more suited for dedicated native plant enthusiasts and conservation-minded gardeners who understand the responsibility that comes with growing rare species.

Supporting Conservation Through Gardening

If you’re passionate about protecting Hawaii’s native plants but can’t find responsibly sourced Coniogramme pilosa, consider this an opportunity to support other native Hawaiian species that are more readily available. Connect with local native plant societies, visit botanical gardens, and learn about other endemic plants that might be better suited for home cultivation while still supporting Hawaii’s unique ecosystem.

Remember, every native plant we grow in our gardens is a small act of conservation – but only when we do it right. In the case of vulnerable species like Coniogramme pilosa, that means patience, responsibility, and a deep respect for Hawaii’s irreplaceable natural heritage.

Loulu

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Pteridaceae E.D.M. Kirchn. - Maidenhair Fern family

Genus

Coniogramme Fée - coniogramme

Species

Coniogramme pilosa (Brack.) Hieron. - loulu

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