North America Native Plant

Small-leaved Rockdaisy

Botanical name: Perityle megalocephala var. oligophylla

USDA symbol: PEMEO

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Small-Leaved Rockdaisy: A Rare California Native Worth Knowing Meet the small-leaved rockdaisy (Perityle megalocephala var. oligophylla), a charming little perennial that’s about as specialized as native plants get. This petite California native might not be the showiest plant in your garden center – in fact, you’re unlikely to find it ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Small-Leaved Rockdaisy: A Rare California Native Worth Knowing

Meet the small-leaved rockdaisy (Perityle megalocephala var. oligophylla), a charming little perennial that’s about as specialized as native plants get. This petite California native might not be the showiest plant in your garden center – in fact, you’re unlikely to find it there at all – but for the dedicated native plant enthusiast, it represents something special: a truly local treasure.

What Makes This Plant Special

The small-leaved rockdaisy is a low-growing shrub that stays delightfully compact, typically reaching only 1.5 feet tall and never exceeding 3 feet at maturity. As its name suggests, this little beauty produces daisy-like flowers and sports small leaves that help it thrive in challenging conditions. It’s a perennial, meaning once established, it’ll return year after year to grace your garden with its understated charm.

Where It Calls Home

This rockdaisy is exclusively native to California, making it a true Golden State endemic. Its limited distribution means you’re looking at a plant that has evolved specifically for California’s unique conditions and ecosystems.

A Word About Rarity

Here’s where things get important: the small-leaved rockdaisy has a conservation status of S4T3?, which indicates some level of conservation concern. While the exact meaning of this status is undefined, it suggests this plant deserves our respect and careful consideration. If you’re interested in growing this species, please ensure you source it from reputable native plant nurseries that propagate their stock rather than wild-collecting.

Garden Potential and Design Ideas

Given its compact size and specialized nature, the small-leaved rockdaisy would be perfect for:

  • Rock gardens and xeriscapes
  • Native California plant collections
  • Specialized drought-tolerant landscapes
  • Conservation-focused gardens

This isn’t a plant for every garden or every gardener. Its appeal lies in its authenticity and connection to California’s natural heritage rather than flashy blooms or easy care.

Growing Conditions (Best Guess)

While specific growing information for this variety is limited, based on its family characteristics and California native status, it likely prefers:

  • Well-draining, rocky or sandy soils
  • Full sun to partial shade
  • Low water requirements once established
  • USDA hardiness zones typical of California (likely 8-10)

The Reality Check

Let’s be honest: finding the small-leaved rockdaisy for your garden will be a challenge. This isn’t a plant you’ll stumble upon at your local nursery. Its rarity and specialized nature mean it’s primarily of interest to serious native plant collectors, restoration projects, or botanical gardens.

If you’re drawn to the idea of growing California natives but want something more readily available, consider exploring other Perityle species or similar small native perennials that offer comparable garden value without the rarity concerns.

Supporting Native Plant Conservation

Whether or not you ever grow a small-leaved rockdaisy, knowing about plants like this helps us appreciate the incredible diversity hiding in our local ecosystems. Every rare native plant represents millions of years of evolution and adaptation to specific conditions – they’re living pieces of natural history worth protecting.

If you’re passionate about California natives, supporting organizations that work to conserve rare species like this rockdaisy helps ensure future generations can appreciate these botanical treasures, whether in the wild or in carefully tended gardens.

Small-leaved Rockdaisy

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Perityle Benth. - rockdaisy

Species

Perityle megalocephala (S. Watson) J.F. Macbr. - Nevada rockdaisy

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