Native Plants

Honohono

Haplostachys haplostachya

USDA symbol: HAHA4

perennial forb

Hawaii: native

If you’re passionate about native Hawaiian plants and conservation gardening, you may have heard whispers about honohono (Haplostachys haplostachya). This unassuming little plant might not win any flashy flower contests, but it holds a special place in Hawaii’s botanical heritage – and unfortunately, it’s fighting for survival. Honohono is a ...

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

Status: S1 | Critically imperiled: Typically 5 or fewer occurrences or under 1,000 remaining individuals.

United States

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

Honohono: A Rare Hawaiian Treasure Worth Protecting

If you’re passionate about native Hawaiian plants and conservation gardening, you may have heard whispers about honohono (Haplostachys haplostachya). This unassuming little plant might not win any flashy flower contests, but it holds a special place in Hawaii’s botanical heritage – and unfortunately, it’s fighting for survival.

What Makes Honohono Special?

Honohono is a perennial forb, which is just a fancy way of saying it’s a soft-stemmed herbaceous plant that comes back year after year. Unlike woody shrubs or trees, this humble plant lacks significant woody tissue and keeps its growing points close to the ground – a smart survival strategy in Hawaii’s sometimes harsh coastal environments.

This endemic Hawaiian species is found nowhere else on Earth, making it a true island treasure. As a native plant, honohono has co-evolved with Hawaii’s unique ecosystems for thousands of years, playing its own special role in the island’s natural communities.

Where Does Honohono Call Home?

Honohono is exclusively found in Hawaii, scattered across several of the Hawaiian Islands. This plant has adapted to life in dry to mesic (moderately moist) forests and rocky coastal areas, where it quietly goes about its business among other native Hawaiian species.

  • Species observed
  • No observations

A Plant in Crisis

Here’s where things get serious: Honohono is critically endangered. With a Global Conservation Status of S1, this means it’s extremely rare with typically fewer than 5 occurrences or very few remaining individuals (less than 1,000). In the United States, it’s officially listed as Endangered.

This rarity status means that if you’re considering growing honohono, you absolutely must ensure any plant material comes from responsible, legitimate conservation sources. Never collect from wild populations – every individual plant is precious for the species’ survival.

Growing Honohono: For the Conservation-Minded Gardener

If you’re fortunate enough to obtain responsibly sourced honohono through proper conservation channels, here’s what you need to know:

Ideal Growing Conditions

  • Climate: USDA Hardiness Zones 10-11 (tropical conditions)
  • Soil: Well-draining soil is essential – honohono doesn’t like wet feet
  • Water: Minimal watering once established; this plant is adapted to drier conditions
  • Location: Protected from strong winds, partial shade to full sun

Garden Role and Design

Honohono isn’t going to be the showstopper in your landscape, but it serves an important role in authentic Hawaiian native plant gardens. It’s perfect for:

  • Conservation-focused native gardens
  • Educational landscapes highlighting endangered species
  • Specialized collections of rare Hawaiian plants
  • Restoration projects (with proper permits and guidance)

Supporting Conservation Efforts

Given honohono’s endangered status, the best way most gardeners can help is by supporting conservation organizations working to protect this species. Consider native alternatives that are more readily available and can provide similar ecological benefits without putting pressure on rare populations.

If you’re specifically interested in growing honohono for conservation purposes, connect with legitimate botanical institutions, native plant societies, or conservation organizations in Hawaii who may have propagation programs.

The Bottom Line

Honohono represents both the beauty and fragility of Hawaii’s native flora. While it may not be the right choice for every garden due to its rarity, understanding and appreciating plants like honohono helps us become better stewards of our native ecosystems. Whether you grow it or simply learn about it, you’re contributing to the important work of plant conservation.

Remember: every endangered plant deserves our respect and protection. If you’re lucky enough to grow honohono, you’re not just gardening – you’re participating in conservation history.

Haplostachys haplostachya is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Haplostachys haplostachya is also known as:

Haplostachys haplostachya John var. angustifolia | USDA symbol: HAHAA
Haplostachys haplostachya John var. leptostachya | USDA symbol: HAHAL

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Lamiales
Family: Lamiaceae Martinov - Mint family
Genus: Haplostachys (A. Gray) Hillebr. - haplostachys

Species: Haplostachys haplostachya (A. Gray) H. St. John - honohono

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