North America Native Plant

Narrowseed Yampah

Botanical name: Perideridia leptocarpa

USDA symbol: PELE6

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Narrowseed Yampah: A Rare California Native Worth Protecting Meet narrowseed yampah (Perideridia leptocarpa), a delicate California native that’s as intriguing as its name suggests. This perennial wildflower might not be the showiest plant in your garden, but it carries the unique charm of a true local native with an important ...

Rare plant alert!

Region: Conservation status by state

Status: S3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ 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 ⚘

Narrowseed Yampah: A Rare California Native Worth Protecting

Meet narrowseed yampah (Perideridia leptocarpa), a delicate California native that’s as intriguing as its name suggests. This perennial wildflower might not be the showiest plant in your garden, but it carries the unique charm of a true local native with an important conservation story.

What Makes Narrowseed Yampah Special?

Narrowseed yampah belongs to the carrot family and grows as a forb – basically a non-woody herbaceous plant that comes back year after year. Think of it as nature’s understated beauty, producing small white flowers arranged in delicate umbrella-like clusters called umbels. While it may not grab attention from across the garden, up close it reveals an intricate, lacy elegance that native plant enthusiasts absolutely adore.

Where Does It Call Home?

This California endemic is found exclusively within the Golden State, making it a true local treasure. Its presence is relatively limited compared to more widespread natives, which adds to both its appeal and its conservation importance.

A Word About Rarity

Here’s something important to know: narrowseed yampah has a Global Conservation Status of S3Q, indicating it’s considered uncommon and potentially at risk. This means if you’re interested in growing this plant, you’ll want to be extra thoughtful about sourcing. Always purchase from reputable native plant nurseries that propagate their plants responsibly rather than collecting from wild populations.

Why Consider Growing Narrowseed Yampah?

Despite its rarity – or perhaps because of it – there are compelling reasons to include this plant in your California native garden:

  • Support local biodiversity by growing a true California endemic
  • Provide nectar for small pollinators who visit its umbel flowers
  • Add authentic local character to wildflower gardens and naturalized areas
  • Contribute to conservation efforts by maintaining genetic diversity in cultivation
  • Enjoy the satisfaction of growing something truly special and uncommon

Garden Design and Landscape Role

Narrowseed yampah works beautifully in native California gardens, wildflower meadows, and restoration projects. Its delicate appearance makes it perfect for naturalizing areas where you want a soft, understated presence. Consider pairing it with other California natives in mixed wildflower plantings or as part of a specialized collection of rare native plants.

Growing Conditions and Care

As a California native, narrowseed yampah is likely adapted to the state’s Mediterranean climate patterns. While specific cultivation information is limited due to its rarity, you can expect it to prefer:

  • Well-draining soils typical of California’s diverse habitats
  • Climate zones similar to other California natives (likely USDA zones 8-10)
  • Natural rainfall patterns with dry summers
  • Minimal water once established, following typical California native care

Planting and Care Tips

Since narrowseed yampah is uncommon in cultivation, growing it successfully may require some patience and experimentation:

  • Source plants only from reputable native plant nurseries
  • Plant in fall for best root establishment before summer heat
  • Provide good drainage to prevent root rot
  • Water moderately the first year, then reduce to match natural rainfall
  • Allow plants to go dormant naturally in summer
  • Be patient – rare natives often establish slowly but reward careful gardeners

Supporting Conservation

By growing narrowseed yampah responsibly, you’re participating in plant conservation. Your garden becomes a genetic repository, helping preserve this uncommon species for future generations. Just remember: always source responsibly, never collect from wild populations, and consider sharing seeds or divisions with other native plant enthusiasts to help expand cultivation of this special California treasure.

Narrowseed yampah may be small and uncommon, but it represents the incredible diversity of California’s native flora. For gardeners who appreciate the rare and unusual, this delicate beauty offers a chance to grow something truly special while supporting conservation efforts right in your own backyard.

Narrowseed 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 leptocarpa T.I. Chuang & Constance - narrowseed yampah

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