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North America Native Plant

Southwestern Pricklypoppy

Southwestern Pricklypoppy: A Rare Arizona Native Worth Knowing If you’re drawn to unique native plants with a bit of mystery, the southwestern pricklypoppy (Argemone pleiacantha ambigua) might catch your attention. This lesser-known Arizona native is part of the prickly poppy family, and while it may not be the showiest plant ...

Rare plant alert!

This plant is listed as rare and may be protected in certain regions. Its populations are limited, and removal from the wild could further endanger its survival. If you wish to enjoy this plant, consider sourcing from reputable nurseries that propagate responsibly or explore alternatives to help preserve natural populations.

Region: Conservation status by state

Status: S4S5T3T4: 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 ⚘ 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. ⚘

Southwestern Pricklypoppy: A Rare Arizona Native Worth Knowing

If you’re drawn to unique native plants with a bit of mystery, the southwestern pricklypoppy (Argemone pleiacantha ambigua) might catch your attention. This lesser-known Arizona native is part of the prickly poppy family, and while it may not be the showiest plant in your garden, it represents an important piece of our southwestern botanical heritage.

What Is Southwestern Pricklypoppy?

Southwestern pricklypoppy is a perennial forb—basically a non-woody flowering plant that comes back year after year. As a native species to the lower 48 states, specifically found in Arizona, this plant has adapted to thrive in our unique southwestern conditions. You might also see it listed under its scientific synonym, Argemone pleiacantha Greene var. ambigua.

Where Does It Grow?

This plant calls Arizona home, making it a true southwestern native. Its limited geographic distribution makes it somewhat special among native plant enthusiasts who appreciate locally-adapted species.

Should You Plant Southwestern Pricklypoppy?

Here’s where things get a bit complicated. While this native plant has potential appeal for native garden enthusiasts, there are some important considerations:

The Rarity Factor

Southwestern pricklypoppy has a Global Conservation Status that suggests it may be uncommon in the wild. If you’re interested in growing this plant, it’s crucial to source it responsibly—never collect from wild populations, and only purchase from reputable native plant nurseries that propagate their own stock.

Limited Information Challenge

Unfortunately, detailed growing information for this specific variety is scarce. This means you’d be somewhat experimenting if you choose to grow it, though you could likely draw from general prickly poppy care guidelines.

What We Don’t Know (Yet)

Part of what makes this plant intriguing is how much remains unknown about it:

  • Specific growing conditions and care requirements
  • Wildlife and pollinator benefits
  • Mature size and growth habits
  • Propagation methods
  • Landscape design applications

Alternative Considerations

If you’re attracted to the idea of southwestern pricklypoppy but want something with more established growing information, consider looking into other Arizona native wildflowers that are better documented and more readily available. Your local native plant society or extension office can point you toward similar species that might satisfy your desire for unique native plants while being easier to grow successfully.

The Bottom Line

Southwestern pricklypoppy represents the fascinating diversity of our native flora, but it’s not necessarily the best choice for beginning native gardeners. If you’re an experienced native plant enthusiast with a passion for rare species and don’t mind some uncertainty in your gardening adventures, this could be an interesting addition to your collection—just make sure you source it ethically.

For most gardeners, exploring the wealth of well-documented Arizona natives might be a more practical starting point for creating beautiful, wildlife-friendly landscapes that celebrate our regional botanical heritage.

Southwestern Pricklypoppy

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Papaverales

Family

Papaveraceae Juss. - Poppy family

Genus

Argemone L. - pricklypoppy

Species

Argemone pleiacantha Greene - southwestern pricklypoppy

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