North America Native Plant

Elusive Jacob’s-ladder

Botanical name: Polemonium elusum

USDA symbol: POEL5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Elusive Jacob’s-Ladder: A Mysterious Idaho Native That Lives Up to Its Name Sometimes in the world of native gardening, you stumble across a plant that’s so mysterious it seems to live up to its common name perfectly. Meet the elusive Jacob’s-ladder (Polemonium elusum), a perennial wildflower that’s native to Idaho ...

Elusive Jacob’s-Ladder: A Mysterious Idaho Native That Lives Up to Its Name

Sometimes in the world of native gardening, you stumble across a plant that’s so mysterious it seems to live up to its common name perfectly. Meet the elusive Jacob’s-ladder (Polemonium elusum), a perennial wildflower that’s native to Idaho and appears to be as hard to pin down in cultivation as it is in the wild.

What Makes This Plant So Elusive?

The elusive Jacob’s-ladder is a member of the Polemonium genus, which includes several beautiful native wildflowers known for their delicate, ladder-like compound leaves and charming bell-shaped flowers. However, Polemonium elusum stands apart from its better-known cousins in one significant way: there’s very little documented information about it in horticultural circles.

As a perennial forb (that’s botanist-speak for a non-woody flowering plant), this Idaho native lacks the significant woody tissue you’d find in shrubs or trees. Instead, it survives winter by storing energy in underground parts, ready to emerge again when conditions are right.

Where Does It Call Home?

According to available records, the elusive Jacob’s-ladder is native to Idaho, making it a true treasure of the American Northwest. Its limited geographic distribution adds to its mysterious nature and suggests it may have very specific habitat requirements.

Should You Try to Grow It?

Here’s where things get tricky. The lack of readily available information about Polemonium elusum’s growing requirements, propagation methods, and even its current conservation status makes it a challenging choice for home gardeners. This mystery surrounding the plant raises some important questions:

  • Is it extremely rare in the wild?
  • Does it have very specific habitat needs that are difficult to replicate?
  • Is seed or plant material even available through reputable native plant sources?

A Word of Caution

Given the uncertainty surrounding this species, we’d recommend proceeding with caution if you encounter Polemonium elusum offered for sale. Before purchasing or attempting to grow this plant, consider:

  • Ensuring any plant material comes from reputable, ethical sources
  • Verifying the plant’s conservation status in Idaho
  • Checking with local native plant societies or botanical experts

Better-Known Alternatives

If you’re drawn to the Jacob’s-ladder family, consider these well-documented native alternatives that offer similar charm with much better-understood growing requirements:

  • Western Jacob’s-ladder (Polemonium occidentale) – native to western mountain regions
  • Leafy Jacob’s-ladder (Polemonium foliosissimum) – native to the Rocky Mountain region
  • Northern Jacob’s-ladder (Polemonium boreale) – native to northern regions

The Bottom Line

The elusive Jacob’s-ladder certainly lives up to its name, remaining mysterious and hard to pin down even in the gardening world. While we always champion growing native plants, this particular species may be better left to botanical experts and conservation efforts until we know more about its status and needs.

Sometimes the most responsible thing we can do as native gardeners is to admire these mysterious plants from afar while supporting better-understood native species in our own gardens. After all, there are plenty of well-documented native treasures waiting to bring beauty and ecological benefits to your landscape!

Elusive Jacob’s-ladder

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Solanales

Family

Polemoniaceae Juss. - Phlox family

Genus

Polemonium L. - Jacob's-ladder

Species

Polemonium elusum J.J. Irwin & R.L. Hartm. - elusive Jacob's-ladder

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