North America Native Plant

Rollins’ Thelypody

Botanical name: Thelypodium rollinsii

USDA symbol: THRO

Life cycle: biennial

Habit: forb

Native status: Native to the lower 48 states  

Rollins’ Thelypody: A Rare Utah Native Worth Protecting Meet Rollins’ thelypody (Thelypodium rollinsii), one of Utah’s most elusive native wildflowers. This little-known member of the mustard family represents the kind of botanical treasure that makes native plant enthusiasts’ hearts skip a beat – if only because it’s so incredibly rare ...

Rare plant alert!

Region: Conservation status by state

Status: S2S3: Status is uncertain but is somewhere between the following rankings: 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) ⚘ 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 ⚘

Rollins’ Thelypody: A Rare Utah Native Worth Protecting

Meet Rollins’ thelypody (Thelypodium rollinsii), one of Utah’s most elusive native wildflowers. This little-known member of the mustard family represents the kind of botanical treasure that makes native plant enthusiasts’ hearts skip a beat – if only because it’s so incredibly rare that most of us will never see one in the wild!

What Makes This Plant Special

Rollins’ thelypody is a biennial forb, meaning it completes its life cycle over two years and lacks the woody stems of shrubs and trees. Like other members of the mustard family, it’s an herbaceous plant that produces its characteristic four-petaled flowers and seed pods that give the family its distinctive appearance.

This species is native to the lower 48 United States, but don’t expect to find it just anywhere – Rollins’ thelypody calls only Utah home, making it what botanists call an endemic species.

A Word of Caution: Rarity Alert

Here’s where things get serious, fellow gardeners. Rollins’ thelypody carries a Global Conservation Status of S2S3, which places it in the uncommon to rare category. This isn’t a plant you can casually add to your shopping cart at the local nursery – and that’s probably for the best.

If you’re absolutely determined to grow this rare beauty, proceed with extreme caution. Only source seeds or plants from reputable native plant societies or conservation organizations that can guarantee the material was obtained legally and ethically. Never, and I cannot stress this enough, never collect this plant from the wild.

Growing Rollins’ Thelypody: The Honest Truth

Here’s where I have to level with you – detailed cultivation information for Rollins’ thelypody is about as rare as the plant itself. Because of its extremely limited distribution and conservation status, this species hasn’t made it into mainstream horticultural guides or gardening resources.

What we do know is that as a biennial forb native to Utah, it likely prefers:

  • Well-draining soils typical of Utah’s diverse landscapes
  • Conditions that match its native habitat requirements
  • A two-year growing cycle, with flowering typically occurring in the second year

Should You Grow It?

The short answer? Probably not, unless you’re involved in conservation efforts or have connections with botanical institutions working to preserve rare Utah endemics. This isn’t a plant for the casual native gardener – it’s more suited for serious conservation work and specialized botanical collections.

Instead, consider supporting Rollins’ thelypody in other ways:

  • Donate to Utah native plant conservation organizations
  • Volunteer for habitat restoration projects in Utah
  • Choose other native Utah mustard family plants that are more common and better suited for home gardens
  • Spread awareness about Utah’s rare endemic species

The Bigger Picture

While you might not be able to grow Rollins’ thelypody in your backyard, learning about it serves an important purpose. Plants like this remind us that our native flora includes incredible diversity – from common species that thrive in cultivation to rare endemics that need our protection in their natural habitats.

Every time we choose native plants for our gardens, support conservation efforts, or simply take time to learn about species like Rollins’ thelypody, we’re contributing to a larger effort to preserve North America’s botanical heritage. And honestly? That’s pretty amazing, even if this particular plant remains safely in its Utah home rather than in our garden beds.

Rollins’ Thelypody

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Thelypodium Endl. - thelypody

Species

Thelypodium rollinsii Al-Shehbaz - Rollins' thelypody

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