North America Native Plant

Clasping Jewelflower

Botanical name: Streptanthus maculatus obtusifolius

USDA symbol: STMAO

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Streptanthus obtusifolius Hook. (STOB2)  âš˜  Stanleya washitana Muhl. ex DC., nom. utique rej. (STWA3)   

Clasping Jewelflower: A Rare Native Gem for Conservation-Minded Gardeners Meet the clasping jewelflower (Streptanthus maculatus obtusifolius), a lesser-known native wildflower that deserves a spotlight in conversations about regional conservation gardening. This delicate annual or biennial forb represents the kind of plant that makes native gardening both rewarding and important for ...

Rare plant alert!

Region: Arkansas

Status: S3T3: 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 ⚘ Subspecies or variety is 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

Clasping Jewelflower: A Rare Native Gem for Conservation-Minded Gardeners

Meet the clasping jewelflower (Streptanthus maculatus obtusifolius), a lesser-known native wildflower that deserves a spotlight in conversations about regional conservation gardening. This delicate annual or biennial forb represents the kind of plant that makes native gardening both rewarding and important for preserving our local ecosystems.

What Makes Clasping Jewelflower Special

The clasping jewelflower belongs to the mustard family and grows as a non-woody forb, meaning it’s an herbaceous plant that dies back to ground level each year. As an annual or biennial, it completes its life cycle in one to two years, making it a charming but ephemeral addition to natural landscapes.

You might also encounter this plant listed under its synonyms Streptanthus obtusifolius or the rejected name Stanleya washitana, though the accepted botanical name remains Streptanthus maculatus obtusifolius.

Where You’ll Find This Native Beauty

This wildflower calls the south-central United States home, with its native range limited to Arkansas and Oklahoma. Its restricted distribution makes it a true regional specialty – a plant that evolved specifically for the conditions found in this part of the country.

A Conservation Consideration

Here’s where things get important: clasping jewelflower carries a Global Conservation Status of S3T3 and an S3 ranking in Arkansas. While the exact definition of this status isn’t entirely clear from available data, S3 rankings typically indicate species that are uncommon to fairly common but face some conservation concerns.

If you’re considering adding this plant to your garden, it’s crucial to source it responsibly. Never collect from wild populations, and only purchase from reputable native plant nurseries that propagate their stock rather than wild-collecting. Better yet, if you’re lucky enough to have this species naturally occurring on your property, protect and nurture those existing populations.

Garden Potential and Considerations

While specific growing information for clasping jewelflower is limited in readily available sources, its status as a native forb suggests it would fit well in:

  • Native plant gardens focused on regional specialties
  • Prairie restoration projects in Arkansas and Oklahoma
  • Conservation gardens supporting rare local species
  • Naturalized areas that mimic local ecosystems

As with most native annuals and biennials, clasping jewelflower likely prefers conditions similar to its natural habitat, though specific soil, light, and moisture requirements aren’t well-documented for this particular subspecies.

Why Choose Native Plants Like Clasping Jewelflower

Growing rare native species like clasping jewelflower serves multiple purposes beyond simple garden beauty. When you cultivate native plants, especially those with limited distributions, you’re:

  • Supporting local ecosystems and the wildlife that depends on native plant communities
  • Preserving genetic diversity for future generations
  • Creating gardens that require fewer inputs once established
  • Connecting with your region’s unique natural heritage

The Bottom Line

Clasping jewelflower represents the intersection of gardening and conservation. While it may not be the showiest plant in your garden, its rarity and native status make it a meaningful choice for gardeners who want to make a difference for local biodiversity.

If you’re in Arkansas or Oklahoma and interested in supporting rare native species, consider reaching out to local native plant societies or conservation organizations. They may have more specific information about growing conditions and responsible sourcing for this special little wildflower.

Remember: the best gardens aren’t just beautiful – they’re also beneficial to the world around them. Clasping jewelflower might just be your ticket to creating a garden that’s both.

Clasping Jewelflower

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

Streptanthus Nutt. - twistflower

Species

Streptanthus maculatus Nutt. - clasping jewelflower

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