North America Native Plant

Mildred’s Clarkia

Botanical name: Clarkia mildrediae lutescens

USDA symbol: CLMIL3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Mildred’s Clarkia: A Rare California Wildflower Worth Protecting If you’ve stumbled across the name Mildred’s clarkia (Clarkia mildrediae lutescens), you’ve encountered one of California’s more elusive native wildflowers. This rare annual herb represents the kind of botanical treasure that makes native plant enthusiasts’ hearts skip a beat – and also ...

Rare plant alert!

Region: Conservation status by state

Status: S3T3: 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 ⚘ 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. ⚘

Mildred’s Clarkia: A Rare California Wildflower Worth Protecting

If you’ve stumbled across the name Mildred’s clarkia (Clarkia mildrediae lutescens), you’ve encountered one of California’s more elusive native wildflowers. This rare annual herb represents the kind of botanical treasure that makes native plant enthusiasts’ hearts skip a beat – and also makes us extra cautious about conservation.

What Makes Mildred’s Clarkia Special

Mildred’s clarkia belongs to the evening primrose family and shares the delicate charm characteristic of its Clarkia cousins. As an annual forb, this herbaceous plant completes its entire life cycle in a single growing season, producing flowers, setting seed, and then dying back naturally – a perfectly orchestrated dance with California’s Mediterranean climate.

What sets this particular species apart isn’t just its beauty, but its rarity. With a conservation status that places it among California’s more vulnerable native plants, Mildred’s clarkia is the kind of species that reminds us why protecting our native plant heritage matters.

Where You’ll Find It (If You’re Lucky)

This California endemic calls the Golden State home, though pinning down its exact range requires some botanical detective work. Like many rare natives, it likely occupies very specific habitat niches that have become increasingly scarce due to development and habitat fragmentation.

A Word of Caution for Gardeners

Here’s where we need to have a serious conversation. While the idea of growing this rare beauty in your garden might be tempting, Mildred’s clarkia requires special consideration due to its conservation status. If you’re interested in this species, here’s what you need to know:

  • Only source seeds or plants from reputable native plant nurseries that can guarantee responsible, sustainable collection practices
  • Never collect seeds or plants from wild populations
  • Consider growing more common Clarkia species that provide similar garden benefits without conservation concerns
  • Contact local native plant societies or botanical gardens for guidance on rare species cultivation

Growing Rare Clarkias: If You Decide to Try

Should you find responsibly sourced material, remember that most Clarkias prefer:

  • Well-draining soil (they’re not fans of soggy feet)
  • Full sun to partial shade
  • Minimal summer water once established
  • Fall or early spring sowing for annual species

As an annual, you’ll need to allow plants to set seed naturally to maintain a population in your garden – think of it as letting nature handle the replanting duties.

Better Alternatives for Most Gardens

If you’re drawn to the Clarkia family but want to avoid the complications of growing rare species, consider these more readily available California natives:

  • Farewell-to-spring (Clarkia amoena) – showier flowers, easier to find
  • Elegant clarkia (Clarkia unguiculata) – widely available and pollinator-friendly
  • Wine cup clarkia (Clarkia purpurea) – stunning purple blooms

The Bigger Picture

Plants like Mildred’s clarkia remind us that our native flora includes not just the common species we see everywhere, but also rare gems that exist in small populations, often in very specific habitats. While we may not all be able to grow these rarities in our gardens, we can support their conservation by:

  • Supporting organizations that protect native plant habitats
  • Choosing common native alternatives for our gardens
  • Spreading awareness about the importance of plant conservation
  • Never collecting rare plants from the wild

Sometimes the best way to appreciate a rare native plant is to admire it from afar and ensure it continues to thrive in its natural habitat for future generations to discover and protect.

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