North America Native Plant

Arroyo De La Cruz Mariposa Lily

Botanical name: Calochortus clavatus var. recurvifolius

USDA symbol: CACLR3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Calochortus clavatus S. Watson ssp. recurvifolius (Hoover) Munz (CACLR)   

Arroyo de la Cruz Mariposa Lily: A Rare California Native Worth Knowing Meet the Arroyo de la Cruz mariposa lily (Calochortus clavatus var. recurvifolius), one of California’s most elusive wildflowers. This stunning native perennial belongs to the fascinating world of mariposa lilies, but unlike its more common cousins, this particular ...

Rare plant alert!

Region: Conservation status by state

Status: S4T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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 ⚘

Arroyo de la Cruz Mariposa Lily: A Rare California Native Worth Knowing

Meet the Arroyo de la Cruz mariposa lily (Calochortus clavatus var. recurvifolius), one of California’s most elusive wildflowers. This stunning native perennial belongs to the fascinating world of mariposa lilies, but unlike its more common cousins, this particular variety is quite the rare gem in the Golden State’s botanical crown.

What Makes This Plant Special?

The Arroyo de la Cruz mariposa lily is a perennial forb—think of it as a non-woody flowering plant that comes back year after year from underground bulbs. As part of the mariposa lily family, it likely produces the characteristically beautiful cup-shaped flowers that these plants are famous for, though specific details about this variety’s blooms are scarce in botanical literature.

Where Does It Call Home?

This rare beauty is endemic to California, with its natural range concentrated in very specific areas of the central coast region. The name Arroyo de la Cruz gives us a clue—it’s likely associated with the Arroyo de la Cruz area in San Luis Obispo County.

A Word of Caution: Rarity Matters

Here’s where things get serious, fellow plant enthusiasts. The Arroyo de la Cruz mariposa lily has a Global Conservation Status of S4T1, indicating it’s extremely rare and potentially at risk. This isn’t a plant you’ll find at your local nursery, and that’s probably for the best.

Important conservation note: If you’re lucky enough to encounter this plant in the wild, admire it from a distance and never dig it up. Photography is the best way to collect this rare beauty.

Should You Try to Grow It?

Given its rarity status, we strongly recommend against attempting to cultivate this plant unless you have access to ethically and legally sourced material from legitimate conservation programs. Even then, growing rare California natives can be incredibly challenging and is best left to experienced native plant specialists and botanical institutions.

Better Alternatives for Your Garden

If you’re drawn to the magic of mariposa lilies, consider these more readily available California natives instead:

  • Yellow mariposa lily (Calochortus luteus)
  • White mariposa lily (Calochortus venustus)
  • Catalina mariposa lily (Calochortus catalinae)

These alternatives can give you that authentic California wildflower experience without putting pressure on rare populations.

Supporting Conservation

The best way to help the Arroyo de la Cruz mariposa lily is to support habitat conservation in its native range. Consider donating to local land trusts or participating in citizen science projects that monitor rare plant populations.

Sometimes the most beautiful gardens are the ones we preserve in the wild, where rare treasures like the Arroyo de la Cruz mariposa lily can continue their ancient dance with California’s coastal ecosystems.

Arroyo De La Cruz 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