North America Native Plant

Paiute Suncup

Botanical name: Camissonia scapoidea macrocarpa

USDA symbol: CASCM

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Camissonia bairdii S.L. Welsh (CABA25)  âš˜  Camissonia scapoidea (Nutt. ex Torr. & A. Gray) P.H. Raven var. macrocarpa (P.H. Raven) Cronquist (CASCM3)  âš˜  Oenothera scapoidea Nutt. ex Torr. & A. Gray ssp. macrocarpa P.H. Raven (OESCM)   

Paiute Suncup: A Rare Desert Gem Worth Protecting in Your Garden Meet the Paiute suncup (Camissonia scapoidea macrocarpa), a delicate desert wildflower that’s as rare as it is beautiful. This little-known native plant brings a touch of sunshine to arid landscapes, but there’s an important conservation story behind its cheerful ...

Rare plant alert!

Region: Conservation status by state

Status: S5T1T3: 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) ⚘ Subspecies or variety is 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. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘ 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) ⚘

Region: Conservation status by state

Paiute Suncup: A Rare Desert Gem Worth Protecting in Your Garden

Meet the Paiute suncup (Camissonia scapoidea macrocarpa), a delicate desert wildflower that’s as rare as it is beautiful. This little-known native plant brings a touch of sunshine to arid landscapes, but there’s an important conservation story behind its cheerful blooms that every gardener should know.

What Makes Paiute Suncup Special

The Paiute suncup is an annual forb in the evening primrose family, producing small but vibrant yellow flowers that seem to glow against the desert backdrop. As a herbaceous plant without woody tissue, it completes its entire life cycle in a single growing season, making every bloom precious.

You might also encounter this plant listed under several scientific synonyms, including Camissonia bairdii, Oenothera scapoidea ssp. macrocarpa, or Camissonia scapoidea var. macrocarpa – all referring to the same special little wildflower.

Where This Desert Beauty Calls Home

The Paiute suncup is native to the American Southwest, specifically found in Arizona and Utah. This limited geographic range makes it a true regional treasure, perfectly adapted to the unique conditions of these desert landscapes.

A Plant in Peril: Understanding Its Rarity

Here’s the crucial part every gardener needs to know: Paiute suncup has a Global Conservation Status of S1, meaning it’s critically imperiled. With typically five or fewer known occurrences and very few remaining individuals in the wild, this plant is fighting for survival.

This rarity status means that while growing Paiute suncup can be incredibly rewarding and important for conservation, it should only be done with seeds or plants from responsible, ethical sources. Never collect from wild populations.

Why Grow Paiute Suncup?

Despite – or perhaps because of – its rarity, Paiute suncup offers unique benefits to the right gardener:

  • Conservation impact: Growing this species helps preserve genetic diversity
  • Native pollinator support: Attracts specialized desert pollinators
  • Authentic desert gardening: Perfect for true native plant enthusiasts
  • Educational value: A conversation starter about plant conservation

Creating the Right Growing Conditions

As a desert native, Paiute suncup thrives in conditions that might challenge other plants. Think hot, dry, and well-draining – the kind of environment that makes most gardeners reach for the hose, but where this little survivor feels right at home.

Key growing requirements include:

  • Soil: Sandy, rocky, or gravelly soils with excellent drainage
  • Water: Minimal irrigation after establishment – let natural rainfall do the work
  • Sun: Full sun exposure mimicking its native desert habitat
  • Climate: Suitable for arid and semi-arid regions

Garden Design Ideas

Paiute suncup shines in specialized garden settings:

  • Native plant collections: A prized specimen for serious native plant gardeners
  • Xeriscaping: Perfect for water-wise desert landscaping
  • Educational gardens: Ideal for demonstrating conservation in action
  • Naturalized areas: Let it self-seed in appropriate wild spaces

Planting and Care Tips

Growing Paiute suncup successfully requires mimicking its natural life cycle:

  • Timing: Direct seed in fall to allow natural winter stratification
  • Spacing: Allow natural spacing as this annual will self-seed
  • Watering: Water gently during germination, then rely on natural precipitation
  • Maintenance: Minimal intervention – let nature take the lead

A Word of Caution and Hope

If you’re inspired to grow Paiute suncup, remember that its critically imperiled status makes responsible sourcing essential. Work only with reputable native plant nurseries or seed companies that can verify their collection practices. Some botanical gardens or conservation organizations may also offer seeds as part of conservation programs.

By growing this rare beauty responsibly, you’re not just adding an unusual plant to your garden – you’re participating in conservation efforts that could help ensure future generations get to experience the simple joy of Paiute suncup’s sunny blooms dotting the desert landscape.

Sometimes the smallest flowers carry the biggest conservation stories, and Paiute suncup is a perfect example of how our gardens can become part of the solution for protecting our native plant heritage.

Paiute 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 scapoidea (Nutt. ex Torr. & A. Gray) P.H. Raven - Paiute suncup

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