North America Native Plant

Santa Catalina Mariposa Lily

Botanical name: Calochortus catalinae

USDA symbol: CACA5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Santa Catalina Mariposa Lily: A Rare Island Treasure for Your Garden Meet the Santa Catalina mariposa lily (Calochortus catalinae), one of California’s most enchanting and exclusive native bulbs. This stunning perennial is like finding a hidden gem – literally! It’s a plant that whispers rather than shouts, but once you ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: 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 ⚘

Santa Catalina Mariposa Lily: A Rare Island Treasure for Your Garden

Meet the Santa Catalina mariposa lily (Calochortus catalinae), one of California’s most enchanting and exclusive native bulbs. This stunning perennial is like finding a hidden gem – literally! It’s a plant that whispers rather than shouts, but once you see its delicate beauty, you’ll understand why it’s captured the hearts of native plant enthusiasts and bulb collectors alike.

A True California Native with Island Roots

The Santa Catalina mariposa lily is authentically American, native to the lower 48 states and specifically calling California home. But here’s where it gets really special – this beauty is endemic to Santa Catalina Island, making it one of the most geographically restricted lilies in North America. Talk about exclusive address!

Why This Plant Deserves a Spot in Your Garden

If you’re drawn to unique, conversation-starting plants, the Santa Catalina mariposa lily might just be your new obsession. As a herbaceous perennial forb, it offers several compelling reasons to consider it for your landscape:

  • Stunning flowers: Produces elegant, tulip-like blooms that are typically white to pale pink with intricate markings
  • Pollinator magnet: Attracts native bees and other beneficial pollinators to your garden
  • Low water needs: Perfect for drought-tolerant and Mediterranean-style gardens
  • Conversation starter: Few gardeners grow this rare island endemic

A Word of Caution: Rarity Matters

Before you rush to add this beauty to your shopping list, there’s something important to know. The Santa Catalina mariposa lily has a Global Conservation Status of S3, meaning it’s considered vulnerable. With only 21 to 100 known occurrences and an estimated 3,000 to 10,000 individuals in the wild, this plant is genuinely rare.

What does this mean for gardeners? If you decide to grow this special lily, please – and we can’t stress this enough – only purchase from reputable nurseries that use responsibly sourced, nursery-propagated material. Never collect from the wild, and always verify the source of your plants.

Perfect Garden Situations

The Santa Catalina mariposa lily isn’t your typical garden center find, but it can thrive in the right conditions:

  • Rock gardens: Excellent drainage and naturalistic setting
  • Mediterranean gardens: Matches the dry summer, wet winter pattern
  • Native plant collections: A prized addition for California native enthusiasts
  • Bulb gardens: Perfect for specialized bulb collectors

Growing Conditions and Care

Like many California natives, this mariposa lily has specific needs that mirror its island home:

  • Climate zones: Best suited for USDA hardiness zones 9-10
  • Soil: Excellent drainage is non-negotiable – think sandy or rocky soils
  • Water: Wet winters, dry summers (Mediterranean climate pattern)
  • Sun: Full sun to light shade
  • Summer dormancy: Goes dormant in summer – don’t panic when it disappears!

Planting and Care Tips

Growing Santa Catalina mariposa lily successfully requires patience and attention to its natural rhythm:

  • Plant timing: Fall planting allows bulbs to establish during winter rains
  • Depth: Plant bulbs 3-4 times their height deep
  • Spacing: Allow 4-6 inches between bulbs
  • Summer care: Reduce or eliminate watering during dormancy
  • Mulching: Use gravel or decomposed granite rather than organic mulches
  • Protection: In areas with summer irrigation, plant in raised beds or containers

The Bottom Line

The Santa Catalina mariposa lily is definitely not a beginner’s plant, but for the right gardener in the right location, it’s pure magic. If you’re in zones 9-10, have experience with Mediterranean climate gardening, and can commit to responsible sourcing, this rare beauty could become the crown jewel of your native plant collection.

Just remember – with great beauty comes great responsibility. By choosing nursery-propagated plants and learning proper care techniques, you’re not just adding a stunning plant to your garden; you’re also supporting conservation efforts for one of California’s most precious island endemics.

Santa Catalina 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 catalinae S. Watson - Santa Catalina 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