North America Native Plant

Milkmaids

Botanical name: Cardamine californica var. sinuata

USDA symbol: CACAS4

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Cardamine integrifolia (Nutt.) Greene var. sinuata (Greene) C.L. Hitchc. (CAINS)  âš˜  Dentaria californica Nutt. var. sinuata (Greene) Detling (DECAS)   

Milkmaids: A Lesser-Known Native Wildflower Worth Discovering If you’re on the hunt for native plants that truly belong in your Pacific Coast garden, meet milkmaids (Cardamine californica var. sinuata) – a charming perennial wildflower that’s been quietly beautifying the western landscape long before any of us thought about native gardening. ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: 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. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Milkmaids: A Lesser-Known Native Wildflower Worth Discovering

If you’re on the hunt for native plants that truly belong in your Pacific Coast garden, meet milkmaids (Cardamine californica var. sinuata) – a charming perennial wildflower that’s been quietly beautifying the western landscape long before any of us thought about native gardening.

What Makes This Plant Special?

This particular variety of milkmaids is a delightful forb – which is just a fancy way of saying it’s a soft-stemmed flowering plant without woody growth. Think of it as nature’s version of a herbaceous perennial that knows exactly where it belongs in the ecosystem.

As a true native to the lower 48 states, milkmaids has earned its place in the natural communities of California, Oregon, and Washington. This regional distribution makes it an excellent choice for gardeners in the Pacific Northwest and California who want to support local ecosystems with plants that have deep historical roots in the area.

Why Consider Growing Milkmaids?

Here’s the honest truth about this native beauty – while it’s definitely a worthwhile addition to native plant gardens, specific growing information for this particular variety can be challenging to find. This often happens with plant varieties that are primarily known in botanical circles rather than mainstream gardening.

What we do know is encouraging:

  • It’s a perennial, so you can count on it returning year after year
  • As a native forb, it likely supports local wildlife in ways we’re still discovering
  • Its regional distribution suggests it’s well-adapted to Pacific coastal conditions
  • Being part of the mustard family (Brassicaceae), it may offer early season blooms when pollinators need them most

The Challenge and the Opportunity

Here’s where growing milkmaids gets interesting – and a bit mysterious. Because this is a specific botanical variety rather than a widely cultivated garden plant, you’re unlikely to find it at your local nursery. This presents both a challenge and an opportunity for the adventurous native plant gardener.

If you’re determined to add this particular variety to your garden, your best bet is to:

  • Connect with native plant societies in California, Oregon, or Washington
  • Look for specialized native plant sales or seed exchanges
  • Contact botanical gardens or universities in the region
  • Consider growing the more widely available Cardamine californica (the species) as an alternative

Growing Considerations

While specific care instructions for var. sinuata are scarce, plants in the Cardamine genus typically appreciate:

  • Moist, well-draining soil conditions
  • Partial shade to filtered sunlight
  • Cool, temperate climates (perfect for the Pacific Coast)
  • Minimal fertilization once established

The Bottom Line

Milkmaids represents the kind of plant that makes native gardening both rewarding and occasionally challenging. While it may not be the easiest plant to source or grow, it offers the satisfaction of cultivating something truly local and ecologically meaningful.

If you can’t locate this specific variety, don’t be discouraged. The broader world of Cardamine species offers similar ecological benefits and may be more accessible for home gardeners. Sometimes the journey of seeking out lesser-known natives leads us to discover other wonderful plants along the way.

For gardeners committed to supporting regional biodiversity, milkmaids serves as a reminder that our native plant communities include many species and varieties that deserve recognition – even if they haven’t made it into mainstream gardening yet.

Milkmaids

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Cardamine L. - bittercress

Species

Cardamine californica (Nutt.) Greene - milkmaids

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