North America Native Plant

Spiked Ipomopsis

Botanical name: Ipomopsis spicata robruthii

USDA symbol: IPSPR3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Ipomopsis spicata (Nutt.) V.E. Grant ssp. robruthiorum Wilken & R.L. Hartm., orth. var. (IPSPR)  âš˜  Ipomopsis spicata (Nutt.) V.E. Grant var. robruthiorum (Wilken & R.L. Hartm.) Dorn, orth. var. (IPSPR2)  âš˜  Ipomopsis spicata (Nutt.) V.E. Grant var. robruthii (Wilken & R.L. Hartm.) Dorn (IPSPR4)   

Spiked Ipomopsis: A Rare Wyoming Native Worth Knowing About If you’re a native plant enthusiast always on the lookout for something truly special, you might have stumbled across Ipomopsis spicata robruthii, commonly known as spiked ipomopsis. But before you start planning where to plant this Wyoming native, there are some ...

Rare plant alert!

Region: Conservation status by state

Status: S5T2: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ 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. ⚘

Spiked Ipomopsis: A Rare Wyoming Native Worth Knowing About

If you’re a native plant enthusiast always on the lookout for something truly special, you might have stumbled across Ipomopsis spicata robruthii, commonly known as spiked ipomopsis. But before you start planning where to plant this Wyoming native, there are some important things you should know about this elusive perennial.

What Makes This Plant Special (and Scarce)

Spiked ipomopsis holds a Global Conservation Status of S5T2, which puts it in the rare category. This isn’t your everyday garden center find – it’s a genuinely uncommon plant that deserves our attention and protection. As a perennial forb (that’s botanist-speak for a non-woody flowering plant), it represents a unique piece of Wyoming’s natural heritage.

Where You’ll Find It in the Wild

This particular variety of spiked ipomopsis calls Wyoming home and, as far as current records show, that’s about it for its native range. It’s what we call an endemic – a plant that’s found in a very specific geographic area and nowhere else naturally.

The Growing Challenge: What We Don’t Know

Here’s where things get a bit tricky for us gardening enthusiasts. Unlike many well-documented native plants, spiked ipomopsis remains somewhat of a mystery when it comes to cultivation details. We don’t have solid information about:

  • Specific growing conditions it prefers
  • USDA hardiness zones
  • Mature size and growth rate
  • Pollinator relationships
  • Propagation methods
  • Care requirements

Should You Grow It?

The short answer is: proceed with extreme caution and responsibility. Given its rare status, if you’re determined to grow spiked ipomopsis, you absolutely must source it responsibly. This means:

  • Never collecting from wild populations
  • Only purchasing from reputable native plant nurseries that propagate their own stock
  • Ensuring any seeds or plants are ethically sourced
  • Contributing to conservation rather than exploitation

Better Alternatives to Consider

Since spiked ipomopsis is both rare and poorly understood in cultivation, you might want to consider other Ipomopsis species that are better documented and more readily available. Many of these relatives offer similar beauty and ecological benefits without the conservation concerns.

Look for other native Wyoming wildflowers that can give you that high-elevation, western charm in your garden while being more sustainable choices for home cultivation.

The Bottom Line

Spiked ipomopsis represents the fascinating complexity of our native flora – some plants remain mysterious even in our information age. While its rarity makes it intriguing, it also means we need to approach it with respect and caution. If you encounter this plant in the wild during your Wyoming adventures, consider yourself lucky to witness something truly special, and please leave it undisturbed for future generations to discover.

For most of us, appreciating spiked ipomopsis means supporting conservation efforts and choosing well-documented native alternatives for our gardens. Sometimes the most responsible way to love a plant is to let it thrive in its natural habitat while we learn more about its needs and ecology.

Spiked Ipomopsis

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

Ipomopsis Michx. - ipomopsis

Species

Ipomopsis spicata (Nutt.) V.E. Grant - spiked ipomopsis

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