North America Native Plant

Wainiha Valley Yellow Loosestrife

Botanical name: Lysimachia ovoidea

USDA symbol: LYOV3

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Wainiha Valley Yellow Loosestrife: Hawaii’s Rare Native Treasure If you’re passionate about Hawaiian native plants and conservation gardening, you may have heard whispers about the elusive Wainiha Valley yellow loosestrife (Lysimachia ovoidea). This remarkable perennial represents one of Hawaii’s most precious botanical treasures – and one of its rarest. What ...

Rare plant alert!

Region: Conservation status by state

Status: S1Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ 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) ⚘

Wainiha Valley Yellow Loosestrife: Hawaii’s Rare Native Treasure

If you’re passionate about Hawaiian native plants and conservation gardening, you may have heard whispers about the elusive Wainiha Valley yellow loosestrife (Lysimachia ovoidea). This remarkable perennial represents one of Hawaii’s most precious botanical treasures – and one of its rarest.

What Makes This Plant Special?

Wainiha Valley yellow loosestrife is a perennial shrub that’s found exclusively in Hawaii, making it a true endemic species. As a member of the primrose family, this multi-stemmed woody plant typically grows less than 13-16 feet tall, with several stems arising from near the ground.

What sets this plant apart isn’t just its Hawaiian heritage – it’s its incredible rarity. With a Global Conservation Status of S1Q, this species exists in critically small numbers, making every individual plant precious for Hawaii’s biodiversity.

Where Does It Grow?

This native Hawaiian species has an extremely limited natural range, found only in specific locations within Hawaii. Its name gives us a clue to its origins – the Wainiha Valley, where this rare beauty was first documented.

Growing Conditions and Habitat

Based on its wetland status classification, Wainiha Valley yellow loosestrife is considered Facultative Upland, meaning it usually thrives in non-wetland conditions but can occasionally be found in wetland areas. This suggests the plant is somewhat adaptable to moisture levels, though it seems to prefer drier conditions overall.

As a Hawaiian endemic, this plant has evolved specifically for Hawaii’s unique climate conditions and would likely struggle in typical mainland growing conditions.

Should You Grow Wainiha Valley Yellow Loosestrife?

Here’s where things get complicated – and important. While this native Hawaiian plant would be an incredible addition to any conservation garden, its extreme rarity means we need to be very thoughtful about cultivation.

The Conservation Consideration

With its S1Q conservation status, every Wainiha Valley yellow loosestrife plant is precious. If you’re considering adding this species to your garden, it’s absolutely crucial that you:

  • Only obtain plants from reputable, licensed Hawaiian native plant nurseries
  • Ensure any plants are ethically propagated, never wild-collected
  • Verify the source can provide proper documentation
  • Consider this plant only if you’re committed to serious conservation efforts

Who Should Grow This Plant?

Wainiha Valley yellow loosestrife isn’t for casual gardeners. This plant is best suited for:

  • Serious Hawaiian native plant enthusiasts
  • Conservation gardens and botanical collections
  • Educational institutions focused on Hawaiian ecology
  • Experienced native plant gardeners in Hawaii

The Reality of Growing Rare Natives

Unfortunately, detailed growing information for Wainiha Valley yellow loosestrife is extremely limited due to its rarity. This lack of cultivation knowledge means growing this plant would require:

  • Consultation with Hawaiian native plant experts
  • Patience and willingness to experiment carefully
  • Understanding that you’d be contributing to conservation efforts
  • Acceptance that success isn’t guaranteed

Alternative Native Hawaiian Plants

If you’re inspired by the idea of growing Hawaiian natives but want something more readily available, consider these alternatives that offer similar conservation value with better cultivation information:

  • Other Hawaiian Lysimachia species that are less rare
  • Hawaiian native shrubs with similar growth habits
  • Well-documented Hawaiian endemic perennials

The Bottom Line

Wainiha Valley yellow loosestrife represents the ultimate challenge in native plant gardening – growing something so rare that simply keeping it alive is a conservation act. While this isn’t a plant for everyone, those dedicated to Hawaiian native plant preservation may find it a worthy addition to specialized collections.

If you do decide to pursue this remarkable plant, remember that you’re not just growing a garden specimen – you’re becoming a steward of one of Hawaii’s most endangered botanical treasures. Make sure you’re ready for that responsibility!

Wainiha Valley Yellow Loosestrife

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Primulales

Family

Primulaceae Batsch - Primrose family

Genus

Lysimachia L. - yellow loosestrife

Species

Lysimachia ovoidea H. St. John - Wainiha Valley yellow loosestrife

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