North America Native Plant

Fuzzystem Phyllostegia

Botanical name: Phyllostegia wawrana

USDA symbol: PHWA2

Life cycle: perennial

Habit: vine

Native status: Native to Hawaii  

Fuzzystem Phyllostegia: A Rare Hawaiian Treasure That Belongs in Conservation, Not Your Garden If you’ve stumbled across the fuzzystem phyllostegia (Phyllostegia wawrana) in your plant research, you’ve discovered one of Hawaii’s most precious and endangered native species. While this perennial herb might sound intriguing for your garden, there’s an important ...

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

Fuzzystem Phyllostegia: A Rare Hawaiian Treasure That Belongs in Conservation, Not Your Garden

If you’ve stumbled across the fuzzystem phyllostegia (Phyllostegia wawrana) in your plant research, you’ve discovered one of Hawaii’s most precious and endangered native species. While this perennial herb might sound intriguing for your garden, there’s an important reason why you shouldn’t plant it – and it’s all about conservation.

What Is Fuzzystem Phyllostegia?

Fuzzystem phyllostegia is a native Hawaiian forb – essentially a soft-stemmed perennial plant without woody tissue. As its name suggests, this member of the mint family likely has fuzzy or hairy stems, though detailed descriptions are scarce due to its extreme rarity. Like other forbs, it grows from perennating buds at or below ground level, allowing it to return year after year in its natural habitat.

Where Does It Grow Naturally?

This rare gem is endemic to Hawaii, meaning it exists nowhere else on Earth naturally. Its distribution is limited to specific locations within the Hawaiian Islands, where it typically grows in upland areas rather than wetlands, though it can occasionally be found in moist conditions.

The Critical Conservation Status

Here’s where things get serious: fuzzystem phyllostegia has a Global Conservation Status of S1, meaning it’s critically imperiled. In plain terms, there are likely fewer than 1,000 individual plants remaining in the wild, possibly as few as five populations total. The species is officially listed as Endangered, making it one of Hawaii’s most threatened native plants.

This is exactly why you shouldn’t plant it in your garden. Any remaining plants need to stay in their natural habitat or in professional conservation programs where they can be properly protected and studied.

Why This Plant Matters (Even If You Can’t Grow It)

Every endangered species plays a unique role in its ecosystem. As a native Hawaiian plant, fuzzystem phyllostegia likely provides specific benefits to local wildlife, though detailed information about its pollinator relationships and wildlife value remains limited due to its rarity. What we do know is that losing this species would mean losing a piece of Hawaii’s natural heritage forever.

Growing Conditions in the Wild

In its natural habitat, fuzzystem phyllostegia grows in Hawaii’s unique climate conditions, thriving in USDA hardiness zones 10-11. As a facultative upland species, it prefers non-wetland conditions but can tolerate some moisture. These specific requirements, combined with its endangered status, make it unsuitable and inappropriate for home cultivation.

What You Can Do Instead

If you’re passionate about Hawaiian native plants, consider these alternatives:

  • Support conservation organizations working to protect endangered Hawaiian species
  • Plant other native Hawaiian species that are more stable and available through reputable nurseries
  • Create habitat for pollinators using common native plants that won’t impact rare species
  • Learn about and advocate for Hawaiian plant conservation efforts

The Bottom Line

While fuzzystem phyllostegia is undoubtedly a fascinating and important plant, it belongs in conservation programs, not in gardens. With so few individuals left in the wild, every plant counts toward the species’ survival. Instead of trying to grow this rare treasure, we can honor it by supporting conservation efforts and choosing other native plants that can thrive in our gardens without conservation concerns.

Sometimes the most caring thing we can do for a plant is to admire it from afar and ensure its wild populations remain undisturbed. Fuzzystem phyllostegia is definitely one of those plants – a living reminder of Hawaii’s unique biodiversity that deserves our protection, not our cultivation.

Fuzzystem Phyllostegia

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

Phyllostegia Benth. - phyllostegia

Species

Phyllostegia wawrana Sherff - fuzzystem phyllostegia

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