North America Native Plant

Arburua Ranch Jewelflower

Botanical name: Streptanthus insignis lyonii

USDA symbol: STINL

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Arburua Ranch Jewelflower: A Rare California Native Worth Protecting Meet the Arburua Ranch jewelflower (Streptanthus insignis lyonii), a charming little annual that’s as rare as it is beautiful. This California native belongs to the mustard family and represents one of nature’s more exclusive garden guests – the kind you’ll want ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4T2: 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) ⚘ 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 ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Arburua Ranch Jewelflower: A Rare California Native Worth Protecting

Meet the Arburua Ranch jewelflower (Streptanthus insignis lyonii), a charming little annual that’s as rare as it is beautiful. This California native belongs to the mustard family and represents one of nature’s more exclusive garden guests – the kind you’ll want to treat with extra special care.

What Makes This Jewelflower Special?

The Arburua Ranch jewelflower is a true California original, found nowhere else in the world except within the Golden State’s borders. As an annual forb, this herbaceous beauty completes its entire life cycle in just one growing season, making every bloom precious and fleeting.

This plant carries a Global Conservation Status of S3S4T2, which means it’s considered rare and potentially vulnerable. That’s conservation-speak for pretty special and worth protecting. When you choose to grow this native, you’re not just adding a unique plant to your garden – you’re participating in conservation efforts.

Garden Appeal and Landscape Role

Don’t expect this jewelflower to steal the show with flashy blooms, but do appreciate its understated charm. Like other members of the Streptanthus family, it produces small, delicate flowers that add subtle beauty to native plant collections. Its annual nature means it’s perfect for gardeners who enjoy the excitement of growing plants from seed each year.

This rare native works beautifully in:

  • Specialized native plant gardens
  • Conservation-focused landscapes
  • Educational demonstration gardens
  • Collectors’ gardens featuring rare California natives

Growing Conditions and Care

As a California native, the Arburua Ranch jewelflower has adapted to the state’s Mediterranean climate patterns. While specific growing requirements aren’t extensively documented due to its rarity, you can follow general guidelines for California native annuals:

  • Provide well-draining soil – soggy roots are a no-go
  • Plant in fall for spring blooms, following California’s natural rainfall patterns
  • Choose a location with morning sun and some afternoon protection
  • Water sparingly once established, mimicking natural rainfall cycles

Since this is an annual, you’ll need to replant from seed each year. This actually makes it quite rewarding for gardeners who enjoy the ritual of starting fresh each season.

The Responsible Choice: Sourcing and Conservation

Here’s the important part: because of its rarity status, you should only grow Arburua Ranch jewelflower if you can source seeds or plants responsibly. This means:

  • Purchase only from reputable native plant nurseries
  • Ensure seeds are ethically collected with proper permissions
  • Never collect from wild populations
  • Consider participating in seed collection programs with conservation organizations

By growing this rare native responsibly, you’re helping preserve genetic diversity and supporting conservation efforts.

Wildlife and Pollinator Benefits

While specific pollinator relationships aren’t well-documented for this rare species, jewelflowers typically attract small native bees and other beneficial insects. Every rare native plant you grow creates habitat and food sources for equally specialized wildlife – it’s like building tiny ecological bridges in your own backyard.

Should You Grow It?

If you’re passionate about California natives, conservation, and have access to responsibly sourced seeds, absolutely! Just remember that growing rare plants comes with responsibility. You’re not just a gardener – you’re a conservation partner.

For most gardeners, consider starting with more common California natives while you develop your native gardening skills. But if you’re ready for the challenge and can source seeds responsibly, the Arburua Ranch jewelflower offers the unique satisfaction of growing something truly special and contributing to its preservation.

After all, every garden can be a small sanctuary, and every gardener can be a conservation hero – one rare seed at a time.

Arburua Ranch 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 insignis Jeps. - plumed jewelflower

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