North America Native Plant

San Bernardino Suncup

Botanical name: Camissonia confusa

USDA symbol: CACO33

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

San Bernardino Suncup: A Rare Desert Gem Worth Growing Responsibly Meet the San Bernardino suncup (Camissonia confusa), a charming little wildflower that’s as elusive as it is beautiful. This delicate annual brings a touch of sunshine to desert landscapes, but there’s something important you should know before adding it to ...

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 ⚘

San Bernardino Suncup: A Rare Desert Gem Worth Growing Responsibly

Meet the San Bernardino suncup (Camissonia confusa), a charming little wildflower that’s as elusive as it is beautiful. This delicate annual brings a touch of sunshine to desert landscapes, but there’s something important you should know before adding it to your garden.

A Rare Beauty That Needs Our Help

Here’s the thing about San Bernardino suncup – it’s considered vulnerable in the wild. With a conservation status of S3, this little gem is found in only 21 to 100 locations across its range, making it a plant that deserves our respect and careful consideration. If you’re thinking about growing it, you’ll want to source seeds or plants from reputable native plant nurseries that practice responsible collection methods.

Where Does It Call Home?

This native beauty is a true child of the American Southwest, naturally occurring in Arizona and California. It’s perfectly adapted to the challenging conditions of desert regions, where it has evolved alongside other native species for thousands of years.

What Makes It Special?

San Bernardino suncup is what botanists call a forb – basically, it’s an herbaceous flowering plant without woody stems. As an annual, it completes its entire life cycle in one growing season, producing cheerful yellow flowers that seem to glow in the desert sun. The blooms are small but numerous, creating a delicate carpet of color when conditions are just right.

Why Your Garden (and Local Wildlife) Will Love It

Despite its delicate appearance, this little plant packs a punch when it comes to supporting local ecosystems:

  • Native bees and other small pollinators absolutely adore the nectar-rich flowers
  • It provides authentic habitat for desert wildlife
  • Requires minimal water once established, making it perfect for water-wise gardens
  • Adds natural beauty without the need for intensive maintenance

Perfect Spots for Your Suncup

San Bernardino suncup thrives in USDA hardiness zones 8-10 and works beautifully in:

  • Native plant gardens
  • Xeriscapes and drought-tolerant landscapes
  • Desert-themed gardens
  • Natural areas where you want to support local biodiversity
  • Rock gardens with sandy or gravelly soil

Growing Your Suncup Successfully

The good news? Once you understand what this plant wants, it’s surprisingly easy to grow:

Soil: Sandy or gravelly soil with excellent drainage is key. This plant absolutely cannot tolerate soggy conditions.

Sun: Full sun is essential – think bright, unfiltered desert sunshine for most of the day.

Water: Low water requirements once established. Water sparingly and let the soil dry between waterings.

Planting: Direct seeding in fall works best, allowing natural winter rains to germinate the seeds. Spring germination leads to beautiful blooms as temperatures warm.

A Word About Conservation

Because San Bernardino suncup is vulnerable in the wild, it’s crucial to source your plants responsibly. Never collect seeds or plants from wild populations – this can harm already stressed native communities. Instead, purchase from reputable native plant societies or nurseries that specialize in southwestern natives and practice ethical collection methods.

By growing this rare beauty in your garden, you’re not just adding something special to your landscape – you’re becoming part of a conservation effort that helps ensure future generations can enjoy these desert treasures too.

The Bottom Line

San Bernardino suncup is a wonderful choice for gardeners who want to support native biodiversity while creating a beautiful, low-maintenance landscape. Just remember to source it responsibly, give it the well-draining conditions it craves, and enjoy watching the native pollinators discover this little slice of desert paradise in your garden.

San Bernardino Suncup

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

Myrtales

Family

Onagraceae Juss. - Evening Primrose family

Genus

Camissonia Link - suncup

Species

Camissonia confusa P.H. Raven - San Bernardino suncup

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