North America Native Plant

Ewan’s Larkspur

Botanical name: Delphinium hansenii ewanianum

USDA symbol: DEHAE

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Ewan’s Larkspur: A Rare California Native Worth Protecting Meet Ewan’s larkspur (Delphinium hansenii ewanianum), a charming yet elusive member of California’s native plant community. This perennial wildflower might not be a household name in gardening circles, but it represents something special – a piece of California’s botanical heritage that deserves ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3: 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. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Ewan’s Larkspur: A Rare California Native Worth Protecting

Meet Ewan’s larkspur (Delphinium hansenii ewanianum), a charming yet elusive member of California’s native plant community. This perennial wildflower might not be a household name in gardening circles, but it represents something special – a piece of California’s botanical heritage that deserves our attention and respect.

What Makes Ewan’s Larkspur Special?

Ewan’s larkspur is a true California native, belonging to the beloved delphinium family known for their distinctive spurred flowers and tall, graceful stems. As a perennial forb – that’s botanist-speak for a non-woody flowering plant – this larkspur returns year after year, adding its presence to California’s diverse plant communities.

What sets this particular larkspur apart is its rarity. With a conservation status that indicates it’s not exactly common in the wild, Ewan’s larkspur represents one of those special plants that make California’s flora so uniquely diverse.

Where Does It Call Home?

This native beauty is found exclusively in California, making it a true Golden State endemic. Like many California natives, it has adapted to the state’s unique climate patterns and soil conditions over thousands of years.

Should You Grow Ewan’s Larkspur in Your Garden?

Here’s where things get interesting – and a bit complicated. While supporting native plants is always admirable, Ewan’s larkspur presents a unique situation for home gardeners:

  • Rarity considerations: With its conservation status indicating limited populations, this isn’t a plant you’ll find at your local nursery
  • Limited information: Specific growing requirements and care instructions are not well-documented
  • Responsible sourcing: If you do encounter this plant, ensure it comes from ethical, conservation-minded sources

The Responsible Approach

If you’re passionate about growing Ewan’s larkspur, here’s what responsible gardeners should know:

  • Only source plants from reputable native plant nurseries that practice ethical propagation
  • Never collect plants or seeds from wild populations
  • Consider this plant only if you’re committed to providing appropriate care for a rare species
  • Connect with local native plant societies or botanical gardens for guidance

Alternative Native Larkspurs

If you’re drawn to the beauty of native larkspurs but want more readily available options, consider these California natives:

  • Red larkspur (Delphinium nudicaule) – stunning red flowers
  • Coast larkspur (Delphinium decorum) – beautiful blue spikes
  • Royal larkspur (Delphinium variegatum) – variable flower colors

These alternatives offer similar aesthetic appeal while being more accessible to home gardeners and less concerning from a conservation standpoint.

Supporting Conservation

Whether or not you grow Ewan’s larkspur in your garden, you can support its conservation by:

  • Supporting organizations that protect California’s native habitats
  • Growing other native plants to support local ecosystems
  • Learning about and sharing information about rare native plants
  • Participating in citizen science projects that monitor native plant populations

The Bottom Line

Ewan’s larkspur represents the incredible diversity and specialization of California’s native flora. While it may not be the easiest choice for most home gardens, it serves as a reminder of why protecting native habitats and growing more common native alternatives matters so much.

If you’re lucky enough to encounter this rare beauty – whether in the wild or through conservation efforts – take a moment to appreciate the thousands of years of evolution that created something so uniquely Californian. Sometimes the best way to honor a plant is simply to know it exists and to protect the places where it thrives naturally.

Ewan’s Larkspur

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Ranunculales

Family

Ranunculaceae Juss. - Buttercup family

Genus

Delphinium L. - larkspur

Species

Delphinium hansenii (Greene) Greene - Eldorado larkspur

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