North America Native Plant

Obispo Suncup

Botanical name: Camissonia campestris obispoensis

USDA symbol: CACAO

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Obispo Suncup: A Rare California Native Worth Protecting Meet the Obispo suncup (Camissonia campestris obispoensis), a charming little annual that’s as rare as it is special. This delicate California native belongs to the evening primrose family and represents one of nature’s more exclusive offerings – the kind of plant that ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4T1T3: 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) ⚘ 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 ⚘ 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. ⚘ 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 ⚘

Obispo Suncup: A Rare California Native Worth Protecting

Meet the Obispo suncup (Camissonia campestris obispoensis), a charming little annual that’s as rare as it is special. This delicate California native belongs to the evening primrose family and represents one of nature’s more exclusive offerings – the kind of plant that makes native gardening enthusiasts do a little happy dance when they spot it in the wild.

Where You’ll Find This California Gem

The Obispo suncup calls California home, with its distribution likely centered around the San Luis Obispo region, as suggested by its scientific name. This annual forb has carved out its niche in the Golden State’s diverse landscapes, though you won’t find it just anywhere – and that’s exactly what makes it so special.

What Makes It Special (And Why You Should Care)

Here’s where things get serious for a moment. The Obispo suncup carries a Global Conservation Status of S3S4T1T3, which is conservation-speak for this plant needs our attention. It’s not common, and its limited distribution means every individual plant matters for the species’ survival.

As an annual forb, this little beauty completes its entire life cycle in just one growing season. It’s a herbaceous plant without woody tissue, meaning it stays soft and green rather than developing bark or woody stems. Think of it as nature’s equivalent of a one-season wonder that packs a lot of charm into a short lifespan.

Should You Grow Obispo Suncup?

The short answer is: maybe, but only if you can source it responsibly. Given its rarity status, this isn’t a plant you want to collect from the wild (please don’t!). If you’re lucky enough to find seeds or plants from reputable native plant nurseries or conservation organizations, then yes – growing Obispo suncup can be a meaningful way to support California’s native plant heritage.

Here’s what makes it garden-worthy:

  • True California native with deep local roots
  • Annual growth habit means it won’t take over your garden
  • Part of the diverse evening primrose family
  • Contributes to native plant conservation efforts
  • Supports local ecosystem relationships

Growing Your Obispo Suncup

Since specific growing information for this subspecies is limited, we’ll work with what we know about its characteristics as a California annual forb. Like most natives, it probably prefers conditions similar to its natural habitat – likely well-draining soils and the Mediterranean climate patterns that California natives love.

As an annual, you’ll need to replant or allow it to self-seed each year. The good news? Annuals are often excellent at self-sowing when they’re happy, so once established, your Obispo suncup might just keep the party going year after year.

A Word About Conservation

Growing rare natives like Obispo suncup is more than gardening – it’s conservation in action. By cultivating these special plants in our gardens, we’re creating backup populations and raising awareness about California’s incredible plant diversity. Just remember: only source your plants responsibly from reputable nurseries or seed exchanges, never from wild populations.

If you can’t find Obispo suncup, consider other California native annuals that might be more readily available. Your local native plant society can point you toward similar species that will give you that same I’m growing something special feeling while supporting your local ecosystem.

The Bottom Line

The Obispo suncup represents the kind of plant that makes native gardening an adventure. It’s rare, it’s special, and it connects your garden to California’s unique natural heritage. While it might not be the easiest plant to find or grow, it’s exactly the kind of species that reminds us why preserving native plant diversity matters.

So if you’re up for a conservation challenge and can source it responsibly, welcome this little annual into your garden. You’ll be doing your part to keep one of California’s special plants thriving for future generations to discover and admire.

Obispo 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 campestris (Greene) P.H. Raven - Mojave suncup

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