North America Native Plant

Honohono

Botanical name: Haplostachys haplostachya

USDA symbol: HAHA4

Life cycle: perennial

Habit: forb

Native status: Native to Hawaii  

Synonyms: Haplostachys haplostachya (A. Gray) H. St. John var. angustifolia (Sherff) H. St. John (HAHAA)  âš˜  Haplostachys haplostachya (A. Gray) H. St. John var. leptostachya (Hillebr.) H. St. John (HAHAL)   

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, ...

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

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.

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.

Honohono

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

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