North America Native Plant

Desert Combleaf

Botanical name: Polyctenium fremontii var. bisulcatum

USDA symbol: POFRB

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Smelowskia fremontii S. Watson var. bisulcata (Greene) O.E. Schulz (SMFRB)   

Desert Combleaf: A Mysterious Oregon Native Worth Learning About If you’re a native plant enthusiast always on the lookout for unique additions to your garden, you might have stumbled across the intriguing name desert combleaf. This uncommon native plant, scientifically known as Polyctenium fremontii var. bisulcatum, is one of those ...

Rare plant alert!

Region: Conservation status by state

Status: S4TH: Status is uncertain but is somewhere between the following rankings: 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 ⚘

Desert Combleaf: A Mysterious Oregon Native Worth Learning About

If you’re a native plant enthusiast always on the lookout for unique additions to your garden, you might have stumbled across the intriguing name desert combleaf. This uncommon native plant, scientifically known as Polyctenium fremontii var. bisulcatum, is one of those botanical mysteries that makes you want to dig deeper into the world of native flora.

What Exactly Is Desert Combleaf?

Desert combleaf is a perennial forb native to the United States, specifically found in Oregon. As a forb, it’s essentially an herbaceous plant without woody stems—think of it as falling into that broad category of non-woody flowering plants that includes many wildflowers and garden perennials we know and love.

This plant has an interesting taxonomic history, with the synonym Smelowskia fremontii var. bisulcata, suggesting it may have been reclassified over time as botanists better understood its relationships to other species.

Where Does It Grow?

Currently, desert combleaf is documented as growing in Oregon, making it a true regional specialty. Its limited geographic distribution immediately tells us this isn’t your typical widespread native plant—it’s something quite special and localized.

The Challenge: Limited Information

Here’s where things get interesting (and a bit frustrating for us plant lovers): there’s remarkably little readily available information about desert combleaf’s growing requirements, appearance, or ecological role. This could mean a few things:

  • It’s extremely rare in the wild
  • It grows in very specific, hard-to-access locations
  • It hasn’t been extensively studied or cultivated
  • It may be taxonomically complex or recently described

Should You Try Growing Desert Combleaf?

Given the limited information available about this plant, approaching desert combleaf with caution makes sense. While we don’t have specific conservation status information, its restricted distribution suggests it may be quite rare. If you’re interested in growing this plant, here are some important considerations:

Responsible Sourcing is Key

If you do decide to pursue growing desert combleaf, it’s absolutely crucial to source it responsibly. Never collect plants from the wild, especially rare natives like this one. Instead:

  • Contact specialized native plant nurseries in Oregon
  • Check with botanical gardens or native plant societies
  • Ensure any plants or seeds come from legitimate cultivation, not wild collection

Alternative Native Options

While you’re searching for information about desert combleaf, consider exploring other Oregon natives that are better documented and more readily available. Your local native plant society or extension office can recommend beautiful, well-understood native forbs that would thrive in your specific location and growing conditions.

The Bottom Line

Desert combleaf represents one of those fascinating botanical puzzles that remind us how much we still have to learn about our native flora. While its mysterious nature makes it intriguing, the lack of cultivation information means it’s probably not the best choice for most home gardeners right now.

If you’re drawn to rare and unusual natives, consider connecting with local botanical researchers or native plant groups—you might even contribute to our understanding of this enigmatic species. Sometimes the most rewarding gardening adventures come from being part of the discovery process rather than simply planting what’s already well-known.

Desert Combleaf

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

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Polyctenium Greene - combleaf

Species

Polyctenium fremontii (S. Watson) Greene - desert combleaf

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