North America Native Plant

Mildred’s Clarkia

Botanical name: Clarkia mildrediae

USDA symbol: CLMI

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Mildred’s Clarkia: A Rare California Gem Worth Protecting Meet Mildred’s clarkia (Clarkia mildrediae), a delicate annual wildflower that’s as special as it is scarce. This little-known native gem calls California home, but you won’t find it growing just anywhere. In fact, you might consider yourself quite lucky to encounter this ...

Rare plant alert!

Region: Conservation status by state

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

Mildred’s Clarkia: A Rare California Gem Worth Protecting

Meet Mildred’s clarkia (Clarkia mildrediae), a delicate annual wildflower that’s as special as it is scarce. This little-known native gem calls California home, but you won’t find it growing just anywhere. In fact, you might consider yourself quite lucky to encounter this rare beauty in the wild – or even more fortunate to help protect it in your garden.

A True California Native with a Story

Mildred’s clarkia belongs to that wonderful group of plants we call true natives – species that evolved right here in the lower 48 states long before European settlement. As an annual forb (that’s garden-speak for a non-woody flowering plant that completes its life cycle in one year), this charming wildflower represents part of California’s unique botanical heritage.

Where You’ll Find It (Or Rather, Where You Won’t)

This rare beauty is found exclusively in California, making it a true Golden State endemic. However, don’t expect to stumble across it on your next hiking adventure – Mildred’s clarkia has earned a conservation status of S3, meaning it’s considered vulnerable throughout its range.

Why So Rare?

With only 21 to 100 known occurrences and an estimated population of 3,000 to 10,000 individual plants, Mildred’s clarkia teeters on the edge of being truly uncommon. This vulnerability makes every single plant precious and every conservation effort meaningful.

Should You Grow Mildred’s Clarkia?

Here’s where things get important: if you’re inspired to help protect this rare native, the answer is a cautious maybe. As a vulnerable species, Mildred’s clarkia should only be grown from responsibly sourced material – never collected from wild populations. Here’s what responsible sourcing means:

  • Seeds purchased from reputable native plant nurseries that propagate their own stock
  • Plants grown from legally obtained, ethically sourced seeds
  • Material that comes with clear documentation of its origin
  • Never, ever digging plants from wild populations

The Garden Potential

As an annual forb, Mildred’s clarkia would likely fit beautifully into wildflower gardens, native plant collections, or conservation-focused landscapes. Like other members of the Clarkia family, it probably produces delicate, colorful blooms that would attract pollinators and add authentic California character to your garden space.

Being an annual means you’d need to let it set seed each year or replant annually – but this also means each plant represents a small act of conservation, helping maintain genetic diversity outside of wild populations.

A Conservation Opportunity

Growing Mildred’s clarkia isn’t just about adding another pretty flower to your garden – it’s about participating in conservation. By cultivating this rare species responsibly, you’re helping maintain its genetic diversity and potentially creating seed for future conservation efforts.

However, if you can’t source Mildred’s clarkia responsibly, consider growing other California native Clarkia species that are more common and readily available. Species like farewell-to-spring (Clarkia amoena) or elegant clarkia (Clarkia unguiculata) offer similar beauty without the conservation concerns.

The Bottom Line

Mildred’s clarkia represents something special – a chance to connect with California’s rarest botanical treasures. If you can source it responsibly, growing this vulnerable native becomes an act of stewardship, helping ensure that future generations might also have the chance to marvel at this delicate endemic.

Just remember: with rare plants comes great responsibility. Always source ethically, never collect from the wild, and consider your garden a small sanctuary for California’s most precious botanical heritage.

Mildred’s Clarkia

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

Myrtales

Family

Onagraceae Juss. - Evening Primrose family

Genus

Clarkia Pursh - clarkia

Species

Clarkia mildrediae (A. Heller) F.H. Lewis & M.E. Lewis - Mildred's clarkia

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