North America Native Plant

Mayacamas Popcornflower

Botanical name: Plagiobothrys lithocaryus

USDA symbol: PLLI

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Allocarya lithocarya Greene ex A. Gray (ALLI)   

Mayacamas Popcornflower: A California Treasure on the Brink Meet the Mayacamas popcornflower (Plagiobothrys lithocaryus), a tiny wildflower with a big story that might just break your gardening heart. This delicate annual is one of California’s botanical mysteries – a plant so rare that it might already be gone forever. What ...

Rare plant alert!

Region: Conservation status by state

Status: SH: Status is uncertain but is somewhere between the following rankings: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘

Mayacamas Popcornflower: A California Treasure on the Brink

Meet the Mayacamas popcornflower (Plagiobothrys lithocaryus), a tiny wildflower with a big story that might just break your gardening heart. This delicate annual is one of California’s botanical mysteries – a plant so rare that it might already be gone forever.

What Makes This Plant Special?

The Mayacamas popcornflower belongs to the forget-me-not family and is classified as an annual forb. Like other members of its family, it’s a non-woody plant that completes its entire life cycle in just one growing season. What sets this particular popcornflower apart isn’t just its beauty, but its heartbreaking rarity.

A California Native in Crisis

This special wildflower is native to California, where it once called the Golden State home. Specifically, it was found in the Mayacamas Mountains region, which gives the plant its common name. Unfortunately, Plagiobothrys lithocaryus currently holds a Global Conservation Status of SH, meaning it’s Possibly Extirpated – known only from historical records with just a glimmer of hope for rediscovery.

Why You Shouldn’t Try to Grow It

Here’s where we need to have a serious conversation, fellow garden enthusiasts. While your heart might be in the right place wanting to help this rare beauty, attempting to grow Mayacamas popcornflower is not recommended for several important reasons:

  • Extreme rarity: This plant may already be extinct in the wild, making seeds or plants virtually impossible to obtain through legitimate sources
  • Unknown growing requirements: With so few historical records, we simply don’t know what specific conditions this plant needs to thrive
  • Conservation concerns: Any remaining populations need professional conservation efforts, not amateur gardening attempts
  • Legal considerations: Collecting rare native plants from the wild is often illegal and always harmful to remaining populations

What We Know About Its Habitat

From historical records, we know that Mayacamas popcornflower was classified as a facultative wetland plant in both the Arid West and Western Mountains, Valleys, and Coast regions. This means it usually occurred in wetlands but could occasionally be found in non-wetland areas. This habitat preference suggests it likely enjoyed moist soils and the seasonal wetland conditions common in California’s Mediterranean climate.

How You Can Help Instead

Rather than trying to grow this possibly extinct treasure, here’s how you can make a real difference:

  • Support native plant conservation: Donate to organizations working to protect California’s rare plants
  • Plant related species: Consider growing other popcornflowers that aren’t at risk, such as common popcornflower (Plagiobothrys nothofulvus)
  • Create wetland habitat: Build a small seasonal wetland area in your garden to support similar native species
  • Report sightings: If you’re hiking in the Mayacamas Mountains and see something that might be this plant, report it to local botanists – you could be part of its rediscovery!

Alternative Popcornflowers for Your Garden

If you’re drawn to the charm of popcornflowers, consider these more readily available California natives:

  • Common popcornflower (Plagiobothrys nothofulvus): A close relative that’s much more widespread
  • Scouler’s popcornflower (Plagiobothrys scouleri): Another annual with similar growing habits
  • Rusty popcornflower (Plagiobothrys nothofulvus): Offers the same family charm without the conservation concerns

The Bigger Picture

The story of Mayacamas popcornflower reminds us why native plant gardening matters so much. By choosing to grow common native species in our gardens, we create stepping stones of habitat that might help prevent other plants from following the same tragic path. Every native plant garden is a small act of conservation – and sometimes, that’s exactly what our struggling native flora needs.

While we may never get the chance to grow Mayacamas popcornflower in our gardens, we can honor its memory by protecting the native plants we still have. After all, today’s common natives could be tomorrow’s conservation stories if we’re not careful.

Mayacamas Popcornflower

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

Plagiobothrys Fisch. & C.A. Mey. - popcornflower

Species

Plagiobothrys lithocaryus (Greene ex A. Gray) I.M. Johnst. - Mayacamas popcornflower

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