North America Native Plant

Roundleaf Stork’s Bill

Botanical name: Erodium macrophyllum

USDA symbol: ERMA5

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Roundleaf Stork’s Bill: A Rare Native Gem for West Coast Gardens If you’re passionate about native gardening and have a soft spot for rare botanical treasures, roundleaf stork’s bill (Erodium macrophyllum) might just capture your heart. This delicate annual or biennial wildflower is a true West Coast native that brings ...

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) ⚘

Roundleaf Stork’s Bill: A Rare Native Gem for West Coast Gardens

If you’re passionate about native gardening and have a soft spot for rare botanical treasures, roundleaf stork’s bill (Erodium macrophyllum) might just capture your heart. This delicate annual or biennial wildflower is a true West Coast native that brings both beauty and ecological value to the right garden setting.

What Makes Roundleaf Stork’s Bill Special?

Roundleaf stork’s bill is a charming forb – that’s garden-speak for a non-woody flowering plant that dies back to ground level. Don’t let its modest size fool you; this little beauty packs a punch with its distinctive rounded, deeply-lobed leaves and delicate pink to purple flowers that seem to dance on slender stems.

As an annual or biennial, this plant completes its life cycle in one to two years, but it’s quite the performer during its time in your garden. The flowers give way to the characteristic stork’s bill seed pods that look exactly like their namesake – long, pointed structures that twist and spiral as they mature.

Native Credentials and Where It Calls Home

This is a true West Coast native, naturally occurring in California and Oregon. It’s perfectly adapted to the Mediterranean climate patterns of the Pacific coast, making it an excellent choice for gardeners wanting to support local ecosystems and reduce water usage.

A Word of Caution: Rarity Matters

Here’s where things get serious. Roundleaf stork’s bill has a Global Conservation Status of S2, meaning it’s considered Imperiled in the wild. With typically only 6 to 20 known occurrences and few remaining individuals (estimated at 1,000 to 3,000), this plant is genuinely rare and vulnerable.

What this means for you: If you want to grow roundleaf stork’s bill, you absolutely must source it responsibly. Only purchase from reputable native plant nurseries that can guarantee their stock comes from ethically collected seeds or propagated material – never from wild populations. Better yet, look for nurseries that participate in conservation programs.

Garden Role and Design Ideas

In the garden, roundleaf stork’s bill shines as:

  • A delicate addition to native wildflower meadows
  • Charming ground cover in rock gardens
  • A conservation specimen in specialized native plant collections
  • An educational plant for demonstrating local botanical heritage

This plant works beautifully in Mediterranean-style gardens, native plant gardens, and naturalized areas where its subtle beauty can be appreciated up close.

Growing Conditions and Care

Roundleaf stork’s bill is surprisingly adaptable once you understand its preferences:

Climate: Hardy in USDA zones 8-10, perfect for mild coastal and inland areas of California and Oregon.

Sun and Soil: Thrives in full sun to partial shade with well-drained soils. Like many Mediterranean natives, it doesn’t appreciate soggy feet, so ensure good drainage.

Water: Once established, this drought-tolerant beauty needs minimal supplemental watering. It’s adapted to the feast-or-famine rainfall patterns of its native range.

Planting and Propagation Tips

The best approach is direct seeding in fall, mimicking natural conditions. Seeds need the cool, moist winter months to germinate properly. If you’re lucky enough to get established plants going, they often self-seed readily, creating naturalized colonies over time.

Start small with this rare species – even a few plants can make a meaningful contribution to conservation efforts while adding unique character to your garden.

Pollinator and Wildlife Benefits

Those delicate flowers aren’t just pretty – they’re valuable nectar sources for small native bees and other beneficial insects. By growing roundleaf stork’s bill, you’re supporting the intricate web of pollinators that our native ecosystems depend on.

Should You Grow Roundleaf Stork’s Bill?

If you’re a dedicated native plant enthusiast with access to responsibly sourced plants or seeds, absolutely! This rare beauty offers a unique opportunity to participate in conservation while enjoying a truly special addition to your garden. Just remember – with great rarity comes great responsibility. Always source ethically, and consider your garden a small sanctuary for this imperiled species.

For gardeners new to native plants or those looking for more readily available alternatives, consider starting with more common native geraniums or other local wildflowers before seeking out this rare gem.

Roundleaf Stork’s Bill

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

Geraniales

Family

Geraniaceae Juss. - Geranium family

Genus

Erodium L'Hér. ex Aiton - stork's bill

Species

Erodium macrophyllum Hook. & Arn. - roundleaf stork's bill

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