North America Native Plant

Ale

Botanical name: Plantago princeps

USDA symbol: PLPR

Life cycle: perennial

Habit: subshrub

Native status: Native to Hawaii  

Ale (Plantago princeps): A Rare Hawaiian Treasure Worth Protecting Meet ale, one of Hawaii’s most precious and endangered native plants. This humble little herb might not win any beauty contests, but it holds a special place in the heart of Hawaiian ecosystems and conservation efforts. If you’re passionate about preserving ...

Rare plant alert!

Region: United States

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) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Ale (Plantago princeps): A Rare Hawaiian Treasure Worth Protecting

Meet ale, one of Hawaii’s most precious and endangered native plants. This humble little herb might not win any beauty contests, but it holds a special place in the heart of Hawaiian ecosystems and conservation efforts. If you’re passionate about preserving Hawaii’s unique flora, ale deserves a spot on your radar—though growing it comes with some important considerations.

What Makes Ale Special?

Ale (Plantago princeps) is a perennial forb herb that’s as rare as it is remarkable. This native Hawaiian plant belongs to the plantain family, but don’t expect the banana-like fruit—this is an entirely different kind of plant altogether! As a forb, ale lacks woody stems and keeps its growing points close to or below ground level, making it a low-growing addition to any landscape.

Where Does Ale Come From?

Ale is found exclusively in Hawaii, making it a true island endemic. This special plant has adapted to life in the Hawaiian archipelago over thousands of years, developing unique characteristics that help it thrive in specific island conditions. You won’t find ale growing wild anywhere else in the world—it’s Hawaii’s own botanical treasure.

A Plant in Crisis: Understanding Ale’s Rarity

Important Conservation Alert: Before we dive into growing tips, there’s something crucial you need to know. Ale carries a Global Conservation Status of S1, which means it’s critically imperiled. In the United States, it’s classified as Endangered. This means there are typically only 5 or fewer occurrences of this plant in the wild, with very few remaining individuals (fewer than 1,000 total).

What does this mean for gardeners? If you’re considering growing ale, you absolutely must source it responsibly. Only obtain plants or seeds from reputable native plant nurseries or conservation programs that can verify their plants weren’t collected from wild populations.

Growing Ale: Challenges and Rewards

Growing ale isn’t for the faint of heart, but conservation-minded gardeners might find it rewarding. Here’s what you need to know:

Ideal Growing Conditions

Ale has a facultative wetland status in Hawaii, meaning it can grow in both wetland and non-wetland conditions. This flexibility makes it adaptable to various moisture levels, though specific growing requirements for this rare plant are specialized and challenging to replicate in typical garden settings.

Garden Design and Landscape Role

If you’re successful in obtaining and growing ale, it works best as:

  • A ground cover in native Hawaiian plant gardens
  • Part of conservation or restoration plantings
  • An educational specimen in botanical collections
  • A component in specialized native ecosystems

The Reality Check: Should You Grow Ale?

Here’s the honest truth about ale: this isn’t a plant for casual gardeners. Given its endangered status and specific growing requirements, ale is best left to:

  • Conservation programs and botanical gardens
  • Serious native plant enthusiasts with proper sourcing
  • Restoration projects led by conservation organizations
  • Educational institutions working on Hawaiian plant preservation

Supporting Ale Conservation

Even if you can’t grow ale in your garden, you can still support its conservation:

  • Donate to Hawaiian native plant conservation organizations
  • Participate in habitat restoration volunteer programs
  • Choose other native Hawaiian plants for your garden
  • Spread awareness about Hawaii’s endangered plant species

The Bottom Line

Ale represents both the incredible uniqueness and the fragility of Hawaii’s native plant life. While most gardeners won’t be growing this endangered species, understanding and appreciating plants like ale helps us become better stewards of our native ecosystems. If you’re passionate about Hawaiian native plants, consider supporting ale’s conservation while exploring other native alternatives that are more readily available and appropriate for home gardens.

Remember: every native plant we preserve today is a gift to future generations. Ale may be small and humble, but it’s an irreplaceable part of Hawaii’s natural heritage.

Ale

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

Plantaginales

Family

Plantaginaceae Juss. - Plantain family

Genus

Plantago L. - plantain

Species

Plantago princeps Cham. & Schltdl. - ale

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