North America Native Plant

Tracy’s Larkspur

Botanical name: Delphinium antoninum

USDA symbol: DEAN5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Tracy’s Larkspur: A Rare California Native Worth Knowing If you’re passionate about native California plants, you might have stumbled across the name Tracy’s larkspur (Delphinium antoninum) in your botanical wanderings. This intriguing perennial forb represents one of those special native plants that deserves a spot in the conversation about California’s ...

Tracy’s Larkspur: A Rare California Native Worth Knowing

If you’re passionate about native California plants, you might have stumbled across the name Tracy’s larkspur (Delphinium antoninum) in your botanical wanderings. This intriguing perennial forb represents one of those special native plants that deserves a spot in the conversation about California’s diverse flora, even if it’s not commonly found in garden centers.

What Makes Tracy’s Larkspur Special?

Tracy’s larkspur belongs to the beloved Delphinium family, known for their distinctive spurred flowers and tall, stately growth habits. As a native California species, this perennial forb has adapted to the unique conditions of the Golden State over thousands of years. Unlike its more common cousins, Tracy’s larkspur appears to have a very limited distribution, making it something of a botanical treasure.

Being a forb means this plant lacks significant woody tissue above ground, putting all its energy into those gorgeous flowers and foliage that die back each year, only to return from underground roots when conditions are right.

Where Does Tracy’s Larkspur Call Home?

This native beauty is found exclusively in California, though specific location data for Delphinium antoninum is quite limited in readily available sources. Like many California natives, it has likely evolved to thrive in the state’s Mediterranean climate with its characteristic wet winters and dry summers.

Should You Grow Tracy’s Larkspur?

Here’s where things get a bit tricky. While Tracy’s larkspur sounds absolutely delightful for native plant enthusiasts, the limited information available about this species suggests it may be quite rare or have very specific growing requirements that aren’t well documented.

The Good News:

  • It’s a true California native, perfect for supporting local ecosystems
  • As a perennial, it should return year after year once established
  • Delphiniums are generally beloved by pollinators, especially bees and hummingbirds
  • Native plants typically require less water and maintenance once established

The Reality Check:

  • This species appears to be extremely rare or poorly documented
  • Finding seeds or plants may be nearly impossible through commercial sources
  • Growing requirements are not well established
  • Without proper documentation, it’s difficult to provide reliable care instructions

A More Practical Approach

If you’re drawn to the idea of growing Tracy’s larkspur but can’t source it responsibly, consider these wonderful alternatives that offer similar appeal:

  • Scarlet larkspur (Delphinium cardinale) – A stunning California native with bright red flowers
  • Red larkspur (Delphinium nudicaule) – Another California native with orange-red blooms
  • Western larkspur (Delphinium hesperium) – Features beautiful blue-purple flowers

These alternatives are more readily available, better documented, and offer the same native plant benefits while being easier to grow successfully.

If You Do Find Tracy’s Larkspur

Should you ever encounter Delphinium antoninum through a reputable native plant society or specialized nursery, make sure any material is ethically and legally sourced. Given its apparent rarity, this plant should never be collected from wild populations.

For growing conditions, you’d likely want to mimic typical California native requirements:

  • Well-draining soil (most California natives hate wet feet)
  • Full sun to partial shade
  • Minimal summer water once established
  • Protection from strong winds

The Bottom Line

Tracy’s larkspur remains something of a botanical mystery – a California native that deserves recognition but may be too rare or specialized for the average home garden. While we celebrate its existence as part of California’s incredible plant diversity, practical gardeners might be better served by choosing one of its more available relatives.

Sometimes the most responsible thing we can do as gardeners is admire rare plants from afar while choosing readily available natives that offer similar benefits. Your local native plant society or California Native Plant Society chapter can help you discover which Delphinium species thrive in your specific area and are available through ethical sources.

Tracy’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 antoninum Eastw. - Tracy's larkspur

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