North America Native Plant

Clubhair Mariposa Lily

Botanical name: Calochortus clavatus var. avius

USDA symbol: CACLA

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Clubhair Mariposa Lily: A Rare California Native Worth Protecting If you’re looking to add a touch of California’s wild beauty to your garden, the clubhair mariposa lily (Calochortus clavatus var. avius) might catch your eye. But before you start shopping, there’s something important you need to know about this stunning ...

Rare plant alert!

Region: Conservation status by state

Status: S4T2: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Clubhair Mariposa Lily: A Rare California Native Worth Protecting

If you’re looking to add a touch of California’s wild beauty to your garden, the clubhair mariposa lily (Calochortus clavatus var. avius) might catch your eye. But before you start shopping, there’s something important you need to know about this stunning native wildflower.

What Makes This Plant Special

The clubhair mariposa lily is a perennial forb—basically a non-woody flowering plant that comes back year after year. Like other mariposa lilies, it produces gorgeous, tulip-like blooms that seem almost too delicate for the wild landscapes they call home. This particular variety is exclusively native to California, making it a true Golden State original.

Where You’ll Find It Growing Wild

This beautiful wildflower is found only in California, where it has adapted to the state’s unique climate and growing conditions. As a native species, it plays an important role in local ecosystems and has co-evolved with California’s wildlife and pollinators over thousands of years.

The Conservation Reality Check

Here’s where things get serious: the clubhair mariposa lily has a Global Conservation Status of S4T2, which indicates this variety faces conservation challenges. This rare status means we need to be extra thoughtful about how we approach growing this plant in our gardens.

What this means for gardeners: If you’re interested in growing this species, it’s crucial to source plants only from reputable native plant nurseries that propagate their stock responsibly—never from wild-collected bulbs or seeds.

Growing Conditions and Care

Like most California natives, mariposa lilies are adapted to the state’s Mediterranean climate. They typically prefer:

  • Well-draining soil (heavy clay is usually a no-go)
  • Full sun to partial shade
  • Dry summers with minimal irrigation once established
  • Cool, moist winters for bulb development

These plants grow from underground bulbs and follow California’s natural rhythm—emerging in spring, blooming in late spring to early summer, then going dormant during the hot, dry summer months.

Garden Design Ideas

The clubhair mariposa lily works beautifully in:

  • California native plant gardens
  • Mediterranean-style landscapes
  • Rock gardens with excellent drainage
  • Naturalized wildflower meadows
  • Containers for close-up appreciation of the intricate blooms

Benefits for Pollinators and Wildlife

When in bloom, mariposa lilies provide nectar for various pollinators, including native bees and butterflies. The flowers’ showy petals and intricate patterns aren’t just pretty to us—they’re specifically designed to attract pollinators that have co-evolved with these plants over millennia.

Should You Grow It?

The clubhair mariposa lily is undeniably beautiful and represents an authentic piece of California’s natural heritage. However, given its rare status, this isn’t a plant for casual gardening. Consider growing it if:

  • You’re committed to conservation and supporting native plant populations
  • You can provide the specific growing conditions it needs
  • You can source plants from reputable, conservation-minded nurseries
  • You’re creating habitat for native pollinators and wildlife

Alternatives to Consider

If you love the idea of mariposa lilies but want a more readily available option, consider other Calochortus species that are less rare, such as the yellow mariposa lily (Calochortus luteus) or white fairy lantern (Calochortus albus), both of which offer similar beauty without the conservation concerns.

The Bottom Line

The clubhair mariposa lily is a testament to California’s incredible plant diversity, but it’s also a reminder that some of our most beautiful natives need our protection. If you choose to grow this rare beauty, do so thoughtfully and responsibly—your garden will become part of the conservation effort to keep this special plant thriving for future generations to enjoy.

Clubhair Mariposa Lily

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Calochortus Pursh - mariposa lily

Species

Calochortus clavatus S. Watson - clubhair mariposa lily

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