North America Native Plant

Parish’s Yampah

Botanical name: Perideridia parishii parishii

USDA symbol: PEPAP2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Parish’s Yampah: A Rare Native Wildflower Worth Knowing If you’re passionate about native plants and love discovering lesser-known wildflowers, Parish’s yampah (Perideridia parishii parishii) might just capture your interest. This perennial forb represents one of nature’s more elusive beauties, quietly thriving in select corners of the American Southwest. What Is ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3T4: Status is uncertain but is somewhere between the following rankings: 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 ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘

Parish’s Yampah: A Rare Native Wildflower Worth Knowing

If you’re passionate about native plants and love discovering lesser-known wildflowers, Parish’s yampah (Perideridia parishii parishii) might just capture your interest. This perennial forb represents one of nature’s more elusive beauties, quietly thriving in select corners of the American Southwest.

What Is Parish’s Yampah?

Parish’s yampah is a native perennial forb belonging to the carrot family. As a forb, it’s an herbaceous plant without woody stems above ground—think of it as nature’s version of a wildflower that returns year after year. This plant has deep roots (literally!) in the landscapes of Arizona, California, and New Mexico, where it has evolved alongside native ecosystems for thousands of years.

Where Does It Grow?

Parish’s yampah calls the southwestern United States home, specifically flourishing in parts of Arizona, California, and New Mexico. This limited geographic distribution makes it a true regional specialty—a plant that embodies the unique character of southwestern landscapes.

Why Consider Parish’s Yampah for Your Garden?

Here’s where things get interesting (and important): Parish’s yampah has a Global Conservation Status of S4T3T4, which indicates it’s a species that deserves our attention and care. This rarity status makes it both a treasure and a responsibility.

The case for growing Parish’s yampah:

  • It’s a true native that supports local ecosystem health
  • As a perennial, it provides long-term garden value
  • You’ll be helping preserve a rare plant species
  • It connects your garden to the unique botanical heritage of the Southwest

Important Conservation Considerations

Before you get too excited about adding this plant to your garden, here’s the crucial part: due to its rarity status, Parish’s yampah should only be grown using responsibly sourced material. This means:

  • Never collect plants or seeds from wild populations
  • Purchase only from reputable native plant nurseries
  • Ask vendors about the source of their plant material
  • Consider participating in conservation efforts if available in your area

Growing Parish’s Yampah: What We Know

Here’s where I need to be honest with you: specific growing information for Perideridia parishii parishii is quite limited in available literature. This subspecies appears to be understudied, which isn’t uncommon for rare native plants.

What we do know is that as a southwestern native, it likely prefers:

  • Well-draining soils typical of its native range
  • Growing conditions that mirror its natural habitat
  • Minimal supplemental watering once established

Is Parish’s Yampah Right for Your Garden?

This plant is perfect for gardeners who:

  • Live within or near its native range (Arizona, California, or New Mexico)
  • Are committed to conservation and responsible gardening
  • Appreciate rare and unique native species
  • Want to support local ecosystems
  • Don’t mind working with a plant that has specific needs

However, it might not be the best choice if you’re looking for a well-documented, easy-care plant with readily available growing information.

The Bottom Line

Parish’s yampah represents something special in the native plant world—a rare gem that connects us to the unique landscapes of the American Southwest. While growing information is limited, its conservation value and native status make it worth considering for dedicated native plant enthusiasts.

If you’re interested in Parish’s yampah, start by contacting local native plant societies or conservation organizations in Arizona, California, or New Mexico. They may have insights into this elusive species and can guide you toward responsible sources.

Remember, sometimes the most rewarding garden plants are those that challenge us to learn, grow, and contribute to conservation efforts. Parish’s yampah might just be one of those special plants that transforms you from a gardener into a plant steward.

Parish’s Yampah

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

Perideridia Rchb. - yampah

Species

Perideridia parishii (J.M. Coult. & Rose) A. Nelson & J.F. Macbr. - Parish's yampah

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