North America Native Plant

Mudflat Quillplant

Botanical name: Lilaeopsis masonii

USDA symbol: LIMA7

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Mudflat Quillplant: A Rare Jewel for Wetland Gardens If you’re passionate about native wetland gardening and conservation, you’ve probably never heard of mudflat quillplant (Lilaeopsis masonii). This tiny, unassuming perennial might not win any beauty contests, but it plays a crucial role in California’s coastal ecosystems and represents one of ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Mudflat Quillplant: A Rare Jewel for Wetland Gardens

If you’re passionate about native wetland gardening and conservation, you’ve probably never heard of mudflat quillplant (Lilaeopsis masonii). This tiny, unassuming perennial might not win any beauty contests, but it plays a crucial role in California’s coastal ecosystems and represents one of the state’s most endangered plant species.

What Makes Mudflat Quillplant Special?

Mudflat quillplant is a fascinating little forb—essentially a non-woody perennial that hugs the ground. Picture tiny, grass-like leaves poking up from muddy tidal flats like miniature green quills. It’s not flashy, but there’s something quietly elegant about its simple, linear form swaying gently in coastal breezes.

This California native is what botanists call an obligate wetland species, meaning it almost exclusively lives in wetland environments. You’ll find it naturally occurring only in the mudflats and salt marshes of California, making it a true Golden State endemic.

The Conservation Reality Check

Here’s where things get serious: mudflat quillplant has a Global Conservation Status of S2, which means it’s imperiled. With typically only 6 to 20 known occurrences and somewhere between 1,000 to 3,000 remaining individuals, this little plant is teetering on the edge of extinction.

What this means for gardeners: If you’re considering adding this species to your landscape, you absolutely must source it responsibly. Never collect from wild populations, and only purchase from reputable native plant nurseries that propagate their stock ethically.

Is Mudflat Quillplant Right for Your Garden?

Let’s be honest—this isn’t a plant for everyone. Mudflat quillplant has very specific needs that make it challenging for typical home gardens:

  • Requires full sun exposure
  • Needs consistently wet, muddy conditions
  • Thrives in saline or brackish water environments
  • Adapted to tidal fluctuations
  • Best suited for USDA hardiness zones 9-10

Where Mudflat Quillplant Shines

This specialized plant is perfect for:

  • Wetland restoration projects: If you’re working on restoring coastal marsh habitat
  • Rain gardens with brackish conditions: Especially in coastal areas
  • Constructed wetlands: For water filtration systems
  • Educational gardens: To showcase rare California natives

Growing Mudflat Quillplant Successfully

If you decide to take on the challenge of growing this rare beauty, here’s what you need to know:

Site Requirements: You’ll need to create or maintain consistently muddy, waterlogged conditions. Think more miniature tidal marsh than regular garden bed. The plant needs periodic flooding and exposure to simulate its natural tidal habitat.

Propagation: Due to its rarity, propagation should be left to experts. If you obtain plants, they’re typically grown from divisions or carefully collected seed from cultivated populations.

Maintenance: Once established in appropriate conditions, mudflat quillplant is relatively low-maintenance. The main challenge is maintaining the specific wet, saline conditions it requires.

Wildlife and Ecological Benefits

While mudflat quillplant may not be a major pollinator magnet (its flowers are small and primarily wind-pollinated), it serves important ecological functions in its native marsh ecosystems. It helps stabilize mudflats and provides habitat structure for small marine invertebrates and marsh-dwelling creatures.

The Bottom Line

Mudflat quillplant is definitely a specialist’s plant. Unless you’re involved in wetland restoration, have access to appropriate saline wetland conditions, and can source plants responsibly, this probably isn’t the right choice for your garden.

However, if you’re passionate about conserving California’s rarest plants and have the right conditions, growing mudflat quillplant can be a meaningful way to participate in preserving our state’s botanical heritage. Just remember: with great rarity comes great responsibility.

Consider this plant if you’re ready to commit to creating and maintaining specialized wetland conditions and supporting conservation efforts. Your garden could become a small ark for one of California’s most endangered species.

Mudflat Quillplant

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Apiales

Family

Apiaceae Lindl. - Carrot family

Genus

Lilaeopsis Greene - grasswort

Species

Lilaeopsis masonii Mathias & Constance - mudflat quillplant

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