North America Native Plant

Maui Chaff Flower

Botanical name: Achyranthes splendens var. rotundata

USDA symbol: ACSPR2

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Synonyms: Achyranthes splendens Mart. ex Moq. var. reflecta Hillebr. (ACSPR)   

Maui Chaff Flower: A Rare Hawaiian Native Worth Preserving Meet the Maui chaff flower (Achyranthes splendens var. rotundata), a humble yet critically important native Hawaiian shrub that’s quietly fighting for survival on the slopes of Maui. While it might not be the flashiest plant in your garden, this unassuming member ...

Rare plant alert!

Region: United States

Status: S2T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Status: Endangered: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Maui Chaff Flower: A Rare Hawaiian Native Worth Preserving

Meet the Maui chaff flower (Achyranthes splendens var. rotundata), a humble yet critically important native Hawaiian shrub that’s quietly fighting for survival on the slopes of Maui. While it might not be the flashiest plant in your garden, this unassuming member of the amaranth family carries the weight of Hawaiian botanical heritage on its woody stems.

A Plant with Serious Conservation Credentials

Before we dive into growing tips, let’s address the elephant in the room: the Maui chaff flower is endangered. With a Global Conservation Status of S2T1, this little shrub is hanging on by a thread in its native habitat. If you’re considering adding this plant to your garden, you’re not just choosing a pretty face – you’re potentially becoming a conservation hero.

Important: Due to its endangered status, only plant Maui chaff flower if you can source it through reputable native plant societies, botanical gardens, or conservation organizations. Wild collection is absolutely off-limits!

Where Does It Call Home?

This Hawaiian endemic is a true island child, native exclusively to Hawaii and naturally occurring only in the Aloha State. It’s a plants that has evolved specifically for Hawaiian conditions, making it a authentic choice for native Hawaiian landscapes.

What Does It Look Like?

The Maui chaff flower is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. Think of it as nature’s way of creating a medium-sized shrub that won’t overwhelm your space but still provides decent structure to your garden. Its stems arise from or near the ground, giving it that classic shrubby appearance that works well in mixed plantings.

Garden Role and Landscape Design

In the garden world, the Maui chaff flower serves as:

  • A conservation specimen that adds authentic Hawaiian character
  • A medium-height shrub for native plant gardens
  • An educational plant that sparks conversations about conservation
  • A structural element in tropical and subtropical landscapes

Growing Conditions and Care

While specific cultivation details for this rare variety are limited, we can make educated guesses based on its native Hawaiian habitat. The Maui chaff flower likely prefers:

  • Well-draining soil (most Hawaiian natives dislike wet feet)
  • USDA hardiness zones 10-11 (it’s tropical, after all)
  • Partial sun to filtered light conditions
  • Protection from strong winds

The Reality Check: Should You Grow It?

Here’s the honest truth: unless you’re deeply committed to Hawaiian native plant conservation and can source this plant responsibly, you might want to consider other options. The Maui chaff flower’s endangered status means it requires careful, knowledgeable cultivation.

However, if you’re passionate about conservation gardening and have access to legitimate sources, growing this plant can be incredibly rewarding. You’ll be participating in ex-situ conservation – basically, creating a backup population outside its natural habitat.

Alternative Considerations

If the Maui chaff flower seems too challenging or unavailable, consider other Hawaiian natives that are more readily available and easier to grow. Many botanical gardens and native plant societies offer workshops on Hawaiian native gardening that can point you toward suitable alternatives.

The Bottom Line

The Maui chaff flower represents something bigger than just another garden plant – it’s a living piece of Hawaiian natural history that needs our help to survive. While it may not be the easiest plant to grow or find, those who can provide it with proper care and responsible sourcing are contributing to something truly meaningful.

Remember, conservation starts in our backyards. Every native plant we grow with care and respect is a small victory for biodiversity. The Maui chaff flower might be rare, but with gardeners like you, it doesn’t have to disappear forever.

Maui Chaff Flower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Amaranthaceae Martinov - Amaranth family

Genus

Achyranthes L. - chaff flower

Species

Achyranthes splendens Mart. ex Moq. - Maui chaff flower

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