North America Native Plant

Trans-pecos False Mountainparsley

Botanical name: Pseudocymopterus longiradiatus

USDA symbol: PSLO3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Cymopterus longiradiatus (Mathias, Constance & W.L. Theob.) B.L. Turner (CYLO15)   

Trans-Pecos False Mountainparsley: A Hidden Gem for Desert Gardens If you’re passionate about native plants and love discovering lesser-known species, Trans-Pecos false mountainparsley might just be the botanical treasure you’ve been seeking. This perennial forb, scientifically known as Pseudocymopterus longiradiatus, is one of those delightfully obscure native plants that deserves ...

Trans-Pecos False Mountainparsley: A Hidden Gem for Desert Gardens

If you’re passionate about native plants and love discovering lesser-known species, Trans-Pecos false mountainparsley might just be the botanical treasure you’ve been seeking. This perennial forb, scientifically known as Pseudocymopterus longiradiatus, is one of those delightfully obscure native plants that deserves more attention from desert gardeners.

What is Trans-Pecos False Mountainparsley?

Trans-Pecos false mountainparsley is a native perennial herb that belongs to the carrot family (Apiaceae). As a forb, it’s an herbaceous plant without significant woody growth, relying on underground structures to survive from year to year. You might also encounter it under its synonym name, Cymopterus longiradiatus, in some older botanical references.

This plant is proudly native to the lower 48 United States, making it an excellent choice for gardeners who want to support local ecosystems and reduce their environmental footprint.

Where Does It Grow Naturally?

Trans-Pecos false mountainparsley calls the desert Southwest home, specifically thriving in New Mexico and Texas. This limited geographic distribution makes it a true regional specialty, perfectly adapted to the unique conditions of the Chihuahuan Desert region.

Why Consider Growing Trans-Pecos False Mountainparsley?

Here are several compelling reasons to add this native plant to your garden:

  • Native Plant Benefits: Supporting local wildlife and maintaining regional ecosystem integrity
  • Low Maintenance: As a desert native, it’s likely very drought-tolerant once established
  • Unique Appeal: Few gardeners grow this species, making it a conversation starter
  • Pollinator Support: Like other carrot family members, it likely produces small white umbel flowers that attract beneficial insects
  • Regional Authenticity: Perfect for creating authentic desert landscapes in its native range

Growing Conditions and Care

While specific cultivation information for Trans-Pecos false mountainparsley is limited (it’s not exactly a mainstream garden center plant!), we can make educated guesses based on its native habitat and family characteristics:

  • Climate Zones: Likely hardy in USDA zones 8-10, matching its Texas and New Mexico range
  • Soil: Well-draining soils are essential; desert natives typically hate wet feet
  • Water: Drought-tolerant once established, requiring minimal supplemental watering
  • Sun: Probably prefers full sun to partial shade
  • Maintenance: Minimal care needed after establishment

Garden Design Ideas

Trans-Pecos false mountainparsley would be perfect for:

  • Native desert gardens
  • Xeriscape landscapes
  • Wildlife habitat gardens
  • Rock gardens with good drainage
  • Educational native plant collections

The Challenge: Finding This Plant

Here’s the honest truth – Trans-Pecos false mountainparsley isn’t something you’ll find at your local garden center. This makes it both special and challenging to grow. If you’re determined to add it to your garden, you might need to:

  • Contact native plant societies in Texas or New Mexico
  • Reach out to specialized native plant nurseries
  • Connect with botanists or researchers studying desert flora
  • Consider growing from seed if you can source it responsibly

Is This Plant Right for You?

Trans-Pecos false mountainparsley is ideal for gardeners who:

  • Live in its native range (New Mexico or Texas)
  • Are passionate about rare native plants
  • Enjoy the challenge of growing uncommon species
  • Want to create authentic regional landscapes
  • Are patient with hard-to-find plants

However, if you’re looking for instant gratification or easy-to-find plants, you might want to start with more common native species and work your way up to rarities like this one.

Supporting Conservation

By choosing to grow native plants like Trans-Pecos false mountainparsley, you’re supporting conservation efforts and helping preserve regional plant diversity. Even if this particular species proves elusive, exploring native alternatives in the carrot family can provide similar ecological benefits while being more readily available.

Whether you manage to track down this botanical treasure or simply appreciate learning about it, Trans-Pecos false mountainparsley represents the kind of specialized native flora that makes regional gardening so rewarding. It’s a reminder that some of nature’s best offerings are hidden gems waiting to be discovered by dedicated native plant enthusiasts.

Trans-pecos False Mountainparsley

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

Pseudocymopterus J.M. Coult. & Rose - false springparsley

Species

Pseudocymopterus longiradiatus Mathias, Constance & W.L. Theobald - Trans-Pecos false mountainparsley

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