North America Native Plant

Perfoliate Spineflower

Botanical name: Mucronea perfoliata

USDA symbol: MUPE2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Chorizanthe perfoliata A. Gray (CHPE4)  âš˜  Chorizanthe perfoliata A. Gray var. opaca (Hoover) Munz (CHPEO)  âš˜  Mucronea perfoliata (A. Gray) A. Heller var. opaca Hoover (MUPEO)   

Perfoliate Spineflower: A Delicate California Native Worth Getting to Know If you’re passionate about supporting California’s native flora, you might want to get acquainted with the perfoliate spineflower (Mucronea perfoliata). This unassuming little annual may not win any beauty contests, but it holds a special place in the Golden State’s ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Perfoliate Spineflower: A Delicate California Native Worth Getting to Know

If you’re passionate about supporting California’s native flora, you might want to get acquainted with the perfoliate spineflower (Mucronea perfoliata). This unassuming little annual may not win any beauty contests, but it holds a special place in the Golden State’s botanical heritage and could be a charming addition to the right native garden.

What Is Perfoliate Spineflower?

Perfoliate spineflower is a native California annual forb that belongs to the buckwheat family. As an annual plant, it completes its entire life cycle in just one growing season, sprouting from seed, flowering, producing new seeds, and then dying back. Don’t let the word spineflower scare you off—while it has tiny bristles, this delicate plant is hardly intimidating!

You might occasionally see this plant listed under its botanical synonyms, including Chorizanthe perfoliata, but Mucronea perfoliata is the current accepted scientific name.

Where Does It Call Home?

This California endemic is found exclusively within the state’s borders, making it a true Golden State original. Its natural range includes the Central Valley and surrounding foothills, where it has adapted to the region’s distinctive Mediterranean climate.

A Conservation Heads-Up

Here’s something important to know: perfoliate spineflower has a somewhat uncertain conservation status. While it’s not officially listed as endangered, its status suggests it may be uncommon or facing some pressures in the wild. If you’re interested in growing this plant, please make sure to source seeds responsibly from reputable native plant societies or nurseries that collect ethically and sustainably.

What Does It Look Like?

Don’t expect showy blooms with this one! Perfoliate spineflower produces tiny white to pinkish flowers that cluster together in small, dense groups. The overall effect is delicate and understated—think of it as nature’s version of baby’s breath, but in miniature. The plant itself stays relatively small and low-growing, making it more of a ground-level accent than a dramatic focal point.

Why Grow Perfoliate Spineflower?

You might wonder why anyone would want to grow such a modest little plant. Here are some compelling reasons:

  • Supporting native biodiversity: Every native plant helps maintain the complex web of relationships between plants, pollinators, and other wildlife
  • Pollinator support: Those tiny flowers are perfectly sized for small native bees and beneficial insects
  • Low maintenance: Once established, this drought-tolerant annual requires minimal care
  • Authentic California gardening: Growing true natives connects you to your local ecosystem’s natural heritage
  • Educational value: It’s a conversation starter about California’s unique flora

Where and How to Grow It

Perfoliate spineflower thrives in USDA hardiness zones 8-10, which covers most of California’s inhabited areas. Here’s what this little native needs to flourish:

Ideal Growing Conditions

  • Sunlight: Full sun exposure
  • Soil: Well-draining soil; tolerates poor, rocky, or sandy conditions
  • Water: Drought-tolerant once established; minimal summer water needed
  • Climate: Adapted to California’s Mediterranean climate with wet winters and dry summers

Planting and Care Tips

Growing perfoliate spineflower is refreshingly straightforward:

  • Timing: Direct sow seeds in fall to mimic natural growing patterns
  • Spacing: Scatter seeds lightly; these plants will naturally space themselves
  • Watering: Provide some water during germination and early growth, then reduce as plants establish
  • Maintenance: Virtually none required—just let nature take its course
  • Reseeding: Allow plants to set seed for natural reseeding in following years

Perfect Garden Partners

Perfoliate spineflower works beautifully in naturalized wildflower meadows, native plant gardens, and xeriscapes. Pair it with other California natives like poppies, lupines, and native grasses for an authentic Golden State look. It’s particularly well-suited for areas where you want a natural, unmaintained appearance.

The Bottom Line

While perfoliate spineflower might not be the showiest plant in your garden, it offers something more valuable: a genuine connection to California’s natural heritage. If you’re creating a native garden, supporting pollinators, or simply want to try something truly local, this modest little annual deserves consideration. Just remember to source your seeds responsibly, and you’ll be doing your part to help preserve this piece of California’s botanical legacy for future generations.

Perfoliate Spineflower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Mucronea Benth. - spineflower

Species

Mucronea perfoliata (A. Gray) A. Heller - perfoliate spineflower

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