North America Native Plant

Rocky Mountain Springparsley

Botanical name: Cymopterus planosus

USDA symbol: CYPL

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Rocky Mountain Springparsley: A Rare Colorado Native Worth Protecting If you’re a gardener who loves discovering hidden gems in the plant world, Rocky Mountain springparsley (Cymopterus planosus) might just capture your imagination. This little-known perennial is a true Colorado original, but before you start planning where to plant it, there ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4: 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 ⚘ 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 ⚘

Rocky Mountain Springparsley: A Rare Colorado Native Worth Protecting

If you’re a gardener who loves discovering hidden gems in the plant world, Rocky Mountain springparsley (Cymopterus planosus) might just capture your imagination. This little-known perennial is a true Colorado original, but before you start planning where to plant it, there are some important things you should know about this rare native beauty.

What Makes Rocky Mountain Springparsley Special?

Rocky Mountain springparsley is a member of the carrot family and grows as what botanists call a forb – essentially a non-woody flowering plant that dies back to the ground each winter and returns the following spring. Don’t let the technical term fool you; it’s simply a hardy perennial that has adapted to life in Colorado’s challenging mountain environment.

This plant is exclusively native to Colorado, making it a true endemic species. When we say it’s a Colorado native, we really mean it – you won’t find this particular springparsley growing wild anywhere else in the world!

The Rarity Factor: Why This Plant Needs Our Attention

Here’s where things get serious. Rocky Mountain springparsley has a Global Conservation Status of S3S4, which indicates it’s considered uncommon to fairly common but still faces some level of conservation concern. This rarity status means that if you’re interested in growing this plant, you’ll need to be extra responsible about how you source it.

Important note: If you decide to grow Rocky Mountain springparsley, only obtain plants or seeds from reputable native plant nurseries or conservation organizations that can guarantee their material was responsibly sourced and legally obtained.

Growing Rocky Mountain Springparsley: What We Know

Here’s where we need to be honest – detailed growing information for Cymopterus planosus is quite limited due to its rarity and specialized habitat requirements. However, we can share what we do know:

  • Plant type: Perennial forb
  • Native range: Colorado only
  • Growth habit: Low-growing, non-woody perennial

Should You Grow Rocky Mountain Springparsley?

This is where we need to have a thoughtful conversation. While Rocky Mountain springparsley is undoubtedly a fascinating native plant, its rarity means it’s not your typical garden center find. Here are some things to consider:

Reasons you might want to grow it:

  • You’re passionate about rare Colorado natives
  • You have experience with challenging or specialized plants
  • You can source it responsibly from conservation programs
  • You want to contribute to its conservation

Reasons you might want to choose alternatives:

  • Limited growing information makes success uncertain
  • Difficulty sourcing responsibly
  • May have very specific habitat requirements
  • Other Cymopterus species might be more readily available

Alternative Native Options

If Rocky Mountain springparsley proves too elusive or challenging, consider these other Colorado native members of the carrot family that might be easier to find and grow:

  • Other Cymopterus species that are more common
  • Wild parsnip relatives native to your specific region
  • Consult local native plant societies for similar alternatives

The Bottom Line

Rocky Mountain springparsley represents the kind of plant that makes native gardening both exciting and challenging. It’s a reminder that our local ecosystems harbor treasures that exist nowhere else on Earth. While it may not be the easiest plant to grow or find, its very existence enriches Colorado’s natural heritage.

If you’re determined to grow this rare beauty, connect with Colorado native plant organizations, botanical gardens, or conservation groups who might have experience with the species. They can provide the best guidance on responsible sourcing and any specific growing requirements this special plant might have.

Remember, sometimes the greatest way to appreciate a rare plant is to support its conservation in the wild while celebrating the more common natives in our own gardens.

Rocky Mountain Springparsley

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

Apiales

Family

Apiaceae Lindl. - Carrot family

Genus

Cymopterus Raf. - springparsley

Species

Cymopterus planosus (Osterh.) Mathias - Rocky Mountain springparsley

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