North America Native Plant

Oysterleaf

Botanical name: Mertensia maritima var. asiatica

USDA symbol: MEMAA2

Life cycle: perennial

Habit: forb

Native status: Native to Alaska  

Synonyms: Mertensia maritima (L.) Gray ssp. asiatica Takeda (MEMAA)   

Oysterleaf: A Rare Alaskan Coastal Treasure Worth Knowing About Meet oysterleaf (Mertensia maritima var. asiatica), one of Alaska’s most intriguing coastal natives that’s as elusive as it is beautiful. This perennial forb represents a unique variety of the sea bluebell family, specifically adapted to Alaska’s challenging coastal environments. While you’re ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Oysterleaf: A Rare Alaskan Coastal Treasure Worth Knowing About

Meet oysterleaf (Mertensia maritima var. asiatica), one of Alaska’s most intriguing coastal natives that’s as elusive as it is beautiful. This perennial forb represents a unique variety of the sea bluebell family, specifically adapted to Alaska’s challenging coastal environments. While you’re unlikely to find this plant at your local nursery, understanding its story offers valuable insights into Alaska’s remarkable botanical diversity.

What Makes Oysterleaf Special

Oysterleaf is a herbaceous perennial that belongs to the borage family, sharing DNA with more familiar garden favorites like forget-me-nots and comfrey. As a forb, it lacks woody stems but develops a robust root system that helps it survive Alaska’s harsh coastal conditions year after year.

This plant earned its intriguing common name oysterleaf likely due to some characteristic that reminded early observers of oysters – though the exact reasoning has been lost to time, adding to its mystique.

Where You’ll Find It (Spoiler: Probably Not in Your Backyard)

Oysterleaf calls Alaska home and only Alaska. This extremely limited native range makes it one of the state’s botanical specialists, perfectly adapted to specific coastal conditions that simply don’t exist elsewhere.

The Reality Check: Why This Isn’t Your Typical Garden Plant

Here’s where we need to have an honest conversation. Oysterleaf carries a conservation status of S5T3T4, which indicates it’s a plant of conservation concern. Combined with its extremely limited range and highly specialized habitat requirements, this isn’t a plant most gardeners should attempt to grow.

The challenges include:

  • Extremely limited natural range
  • Unknown specific growing requirements
  • Likely requires very specific coastal conditions
  • Difficult or impossible to source responsibly
  • May not adapt well outside its native habitat

What We Don’t Know (And Why That Matters)

Unfortunately, detailed information about oysterleaf’s growing conditions, wildlife benefits, and cultivation requirements remains largely unknown. This knowledge gap itself tells us something important: this is a plant that exists in such specific, limited conditions that it hasn’t been extensively studied or cultivated.

The Bigger Picture

While you probably can’t (and shouldn’t try to) grow oysterleaf in your garden, its existence reminds us of the incredible diversity of native plants adapted to specific regional conditions. Alaska’s coastal environments support unique plant communities that have evolved over thousands of years.

Instead of attempting to grow this rare variety, consider exploring other members of the Mertensia family that might be more appropriate for cultivation, or focus on native plants that are actually suited to your local conditions and available through responsible sources.

A Plant Worth Protecting, Not Picking

Sometimes the best way to appreciate a native plant is to leave it where it belongs. Oysterleaf represents the kind of specialized coastal adaptation that makes Alaska’s flora so remarkable. If you’re ever fortunate enough to encounter this plant in its natural habitat, consider yourself lucky to witness one of nature’s perfectly adapted coastal specialists.

The story of oysterleaf reminds us that not every beautiful native plant belongs in our gardens – and that’s perfectly okay. Some plants are meant to remain wild, thriving in the specific conditions that shaped them over millennia.

Oysterleaf

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

Boraginaceae Juss. - Borage family

Genus

Mertensia Roth - bluebells

Species

Mertensia maritima (L.) Gray - oysterleaf

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