North America Native Plant

Newton’s Larkspur

Botanical name: Delphinium newtonianum

USDA symbol: DENE2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Newton’s Larkspur: A Rare Arkansas Native Worth Protecting If you’re a gardener who loves rare native plants, you’ve probably never heard of Newton’s larkspur (Delphinium newtonianum). And honestly? That’s not surprising. This perennial wildflower is one of Arkansas’s best-kept secrets – not by choice, but because it’s incredibly rare and ...

Rare plant alert!

Region: Arkansas

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 ⚘ 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 ⚘

Region: Arkansas

Newton’s Larkspur: A Rare Arkansas Native Worth Protecting

If you’re a gardener who loves rare native plants, you’ve probably never heard of Newton’s larkspur (Delphinium newtonianum). And honestly? That’s not surprising. This perennial wildflower is one of Arkansas’s best-kept secrets – not by choice, but because it’s incredibly rare and found nowhere else in the world.

What Makes Newton’s Larkspur Special?

Newton’s larkspur is what botanists call a forb – basically a fancy way of saying it’s a non-woody perennial plant. Think of it as the herbaceous cousin of shrubs and trees. This delicate native belongs to the buttercup family and shares the characteristic spurred flowers that make delphiniums so distinctive.

What makes this plant truly remarkable isn’t just its beauty, but its rarity. With a global conservation status of S3 (Vulnerable), Newton’s larkspur is teetering on the edge of being seriously threatened. In plain English, that means there are likely only between 3,000 and 10,000 individual plants left in the wild.

Where Does Newton’s Larkspur Call Home?

Here’s where things get really interesting (and concerning): Newton’s larkspur is found in only one state – Arkansas. That’s it. Nowhere else in the entire world can you find this plant growing naturally. It’s what we call an endemic species, making it incredibly precious from a conservation standpoint.

Should You Grow Newton’s Larkspur?

This is where things get complicated. While Newton’s larkspur would undoubtedly be a fascinating addition to any native plant garden, its extreme rarity raises serious ethical questions. Here’s what you need to know:

  • The plant is vulnerable and exists in very limited populations
  • Collecting from wild populations could harm already fragile ecosystems
  • Commercial availability is virtually nonexistent
  • Growing conditions and care requirements are poorly understood due to limited study

A Conservation-Minded Approach

If you’re determined to grow Newton’s larkspur, proceed with extreme caution. Only consider it if you can source seeds or plants through legitimate conservation programs or botanical institutions. Never, ever collect from wild populations – you could be contributing to the plant’s decline.

Instead, consider supporting conservation efforts for this rare beauty by:

  • Donating to Arkansas native plant conservation organizations
  • Volunteering with habitat restoration projects
  • Growing other native Arkansas delphiniums that aren’t threatened
  • Spreading awareness about rare native plants in your community

Alternative Native Beauties

While you probably shouldn’t grow Newton’s larkspur, Arkansas has plenty of other stunning native wildflowers that would love a spot in your garden. Consider native alternatives like wild columbine, native asters, or other regional wildflowers that can provide similar aesthetic appeal without conservation concerns.

The Bottom Line

Newton’s larkspur represents both the incredible diversity of our native flora and the fragility of rare ecosystems. While it’s tempting to want to grow every beautiful native plant we encounter, sometimes the most loving thing we can do is admire from afar and work to protect what remains in the wild.

If this rare beauty has captured your imagination, channel that enthusiasm into supporting broader native plant conservation efforts. After all, the best way to honor Newton’s larkspur might just be ensuring it has a future in its natural Arkansas home.

Newton’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 newtonianum D.M. Moore - Newton'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