North America Native Plant

Parry Horkelia

Botanical name: Horkelia parryi

USDA symbol: HOPA2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Parry Horkelia: A Rare California Native Worth Preserving in Your Garden If you’re passionate about California native plants and have a thing for botanical rarities, Parry horkelia (Horkelia parryi) might just capture your heart. This diminutive perennial forb is one of those special plants that makes native plant enthusiasts do ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Parry Horkelia: A Rare California Native Worth Preserving in Your Garden

If you’re passionate about California native plants and have a thing for botanical rarities, Parry horkelia (Horkelia parryi) might just capture your heart. This diminutive perennial forb is one of those special plants that makes native plant enthusiasts do a little happy dance – but it comes with some important considerations that every responsible gardener should know about.

What Makes Parry Horkelia Special?

Parry horkelia is a charming little perennial that belongs to the rose family, though you might not immediately see the family resemblance. This herbaceous beauty forms low rosettes of palmate leaves (think tiny hands with multiple fingers) and sends up delicate clusters of small, white to cream-colored flowers that seem to glow against the foliage.

As a California endemic, this plant has evolved specifically for the Golden State’s unique conditions. It’s a true native that calls only California home, making it a perfect choice for gardeners looking to support local ecosystems and create authentic regional landscapes.

Where Does Parry Horkelia Grow?

You’ll find Parry horkelia naturally occurring in California’s mountainous regions, particularly in the Sierra Nevada and some coastal ranges. It’s adapted to the state’s Mediterranean climate and specific soil conditions that these areas provide.

Important Conservation Considerations

Here’s where things get serious for a moment. Parry horkelia has a Global Conservation Status of S2, which means it’s considered Imperiled. This classification indicates that the species faces extreme rarity or vulnerability to extinction, with typically only 6 to 20 known occurrences and somewhere between 1,000 to 3,000 remaining individuals in the wild.

What does this mean for gardeners? If you’re interested in growing Parry horkelia, it’s absolutely crucial to source your plants responsibly. Never collect from wild populations, and only purchase from reputable nurseries that propagate their plants from legally and ethically obtained stock. Better yet, look for nurseries that participate in conservation efforts for rare California natives.

Why Grow Parry Horkelia?

Despite its rarity – or perhaps because of it – there are compelling reasons to consider Parry horkelia for your garden:

  • Support conservation efforts by maintaining genetic diversity in cultivation
  • Create habitat for specialized pollinators that depend on rare native plants
  • Add an authentic piece of California’s natural heritage to your landscape
  • Enjoy a truly unique plant that few gardeners will recognize
  • Contribute to scientific understanding through careful observation and record-keeping

Perfect Garden Settings

Parry horkelia thrives in specialized garden environments that mimic its natural mountain habitat:

  • Rock gardens with excellent drainage
  • Alpine or high-elevation themed gardens
  • Native California plant collections
  • Water-wise landscapes with Mediterranean plants
  • Container gardens for close observation

Growing Conditions and Care

Success with Parry horkelia requires understanding its mountain origins. This plant prefers:

  • Well-draining, sandy or rocky soils that never stay soggy
  • Full sun to partial shade (morning sun with afternoon protection in hot climates)
  • Cool, moist conditions during the growing season
  • Dry summers once established (typical of California natives)
  • USDA hardiness zones 7-9

Planting and Care Tips

Growing rare plants like Parry horkelia requires extra attention to detail:

  • Plant in fall for best establishment before summer heat
  • Ensure perfect drainage – consider raised beds or containers
  • Water regularly the first year, then reduce to occasional deep watering
  • Mulch lightly with decomposed granite or small pebbles
  • Avoid fertilizers, which can harm native plants adapted to poor soils
  • Keep detailed records of your plant’s performance for conservation data

Pollinator and Wildlife Benefits

While small in stature, Parry horkelia punches above its weight in supporting local wildlife. Its flowers attract small native bees and other specialized pollinators that have co-evolved with California’s mountain flora. By growing this plant, you’re providing crucial habitat for insects that might otherwise struggle to find appropriate food sources.

The Bottom Line

Parry horkelia isn’t a plant for everyone, and that’s perfectly okay. Its conservation status means it should only be grown by gardeners committed to responsible cultivation and care. If you’re passionate about rare plants, dedicated to conservation, and excited about the challenge of growing something truly special, Parry horkelia could be a rewarding addition to your garden.

Remember, with rare plants comes great responsibility. By choosing to grow Parry horkelia, you’re becoming a steward of California’s botanical heritage – and that’s a pretty amazing role to play in your own backyard.

Parry Horkelia

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

Rosales

Family

Rosaceae Juss. - Rose family

Genus

Horkelia Cham. & Schltdl. - horkelia

Species

Horkelia parryi Greene - Parry horkelia

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