North America Native Plant

Oregon Checkerbloom

Botanical name: Sidalcea oregana oregana var. calva

USDA symbol: SIORC2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Oregon Checkerbloom: A Rare Washington Native Worth Protecting Meet Oregon checkerbloom (Sidalcea oregana oregana var. calva), a fascinating and extraordinarily rare native wildflower that calls Washington state home. This isn’t your typical garden center find – it’s actually one of the Pacific Northwest’s botanical treasures that deserves our attention and ...

Rare plant alert!

Region: United States

Status: S5T1: 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) ⚘ 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. ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Oregon Checkerbloom: A Rare Washington Native Worth Protecting

Meet Oregon checkerbloom (Sidalcea oregana oregana var. calva), a fascinating and extraordinarily rare native wildflower that calls Washington state home. This isn’t your typical garden center find – it’s actually one of the Pacific Northwest’s botanical treasures that deserves our attention and respect.

A Plant with Serious Conservation Status

Before we dive into the gardening details, let’s address the elephant in the room: this variety of Oregon checkerbloom is endangered in Washington’s Wenatchee Mountains. With a global conservation status that reflects its precarious position, this isn’t a plant to take lightly. If you’re considering adding it to your garden, you’ll need to source it responsibly – and that’s a big if, given its rarity.

What Exactly Is Oregon Checkerbloom?

Oregon checkerbloom is a perennial forb, which is botanist-speak for a soft-stemmed plant that comes back year after year. Unlike woody shrubs or trees, this herbaceous beauty puts its energy into flowers and foliage rather than building up thick, woody stems. Think of it as nature’s way of creating a low-maintenance perennial that focuses on the good stuff – the blooms!

Where Does It Call Home?

This particular variety has a very limited native range, found only in Washington state. Its restricted distribution is part of what makes it so special – and so vulnerable. In the wild, you might encounter it in the Wenatchee Mountains, though spotting one would be quite the botanical treasure hunt given its endangered status.

Should You Plant Oregon Checkerbloom?

Here’s where things get complicated. While supporting native plants is always admirable, Oregon checkerbloom var. calva presents some unique challenges:

  • Rarity concerns: With its endangered status, wild populations need protection rather than disturbance
  • Limited availability: You’re unlikely to find this variety in typical nurseries
  • Specialized needs: As a rare endemic, it likely has very specific growing requirements
  • Conservation responsibility: Any planting should only use ethically sourced, propagated material

Growing Considerations

If you do manage to obtain responsibly sourced Oregon checkerbloom, remember that as a Washington native, it’s adapted to Pacific Northwest conditions. Like most native forbs, it likely prefers well-draining soil and may have specific seasonal water needs. However, given the limited information available about this particular variety’s cultivation requirements, success would require patience and careful observation.

Alternative Native Options

If you’re drawn to supporting Washington’s native flora but want something more readily available, consider exploring other native Sidalcea species or varieties that aren’t endangered. Your local native plant society or conservation-focused nursery can point you toward similar species that will give you that native wildflower look without the conservation concerns.

The Bottom Line

Oregon checkerbloom var. calva is more of a conservation story than a typical gardening recommendation. While it represents the incredible diversity of our native flora, its endangered status means it’s better appreciated and protected in its natural habitat. If native wildflowers call to you, there are plenty of other Washington natives that can scratch that itch while leaving this rare beauty to recover in peace.

Sometimes the best way to love a plant is to admire it from afar and support the conservation efforts working to protect it for future generations.

Oregon Checkerbloom

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Malvales

Family

Malvaceae Juss. - Mallow family

Genus

Sidalcea A. Gray - checkerbloom

Species

Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray - Oregon checkerbloom

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