North America Native Plant

Socrates Mine Jewelflower

Botanical name: Streptanthus brachiatus brachiatus

USDA symbol: STBRB

Life cycle: annual

Habit: subshrub

Native status: Native to the lower 48 states  

Socrates Mine Jewelflower: A Rare California Native Worth Protecting If you’re a native plant enthusiast with a passion for conservation, you might be intrigued by the Socrates Mine jewelflower (Streptanthus brachiatus brachiatus). This California native is more than just a pretty face in the garden – it’s a rare botanical ...

Rare plant alert!

Region: Conservation status by state

Status: S2T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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) ⚘

Socrates Mine Jewelflower: A Rare California Native Worth Protecting

If you’re a native plant enthusiast with a passion for conservation, you might be intrigued by the Socrates Mine jewelflower (Streptanthus brachiatus brachiatus). This California native is more than just a pretty face in the garden – it’s a rare botanical treasure that deserves our attention and protection.

What Makes This Plant Special?

The Socrates Mine jewelflower is a forb herb, which is just a fancy way of saying it’s a soft-stemmed plant without woody growth. Unlike trees or shrubs that develop thick, woody stems, this little beauty keeps things simple with herbaceous stems that die back seasonally. It can live as either an annual (completing its life cycle in one year) or a perennial (coming back year after year), giving it some flexibility in how it approaches life.

Where You’ll Find It (Or Won’t)

This native Californian is a true Golden State endemic, meaning it calls California home and nowhere else. However, don’t expect to stumble across it on your next hiking adventure – this plant is quite the rarity.

A Word of Caution: Rarity Alert!

Here’s where things get serious, fellow gardeners. The Socrates Mine jewelflower has a Global Conservation Status of S2T1, which places it in the critically imperiled category. This means the plant faces a very high risk of extinction due to extreme rarity, steep declines, or other factors that make its future uncertain.

If you’re considering adding this plant to your garden, please proceed with extreme caution and responsibility:

  • Only obtain plants or seeds from verified, ethical sources that practice responsible propagation
  • Never collect from wild populations
  • Consider whether your garden can truly provide the specific conditions this rare plant needs
  • Think about supporting conservation efforts for this species instead of or in addition to growing it

Growing Challenges and Considerations

Unfortunately, detailed growing information for this specific subspecies is quite limited in available literature. This scarcity of cultivation information, combined with its rare status, suggests that Socrates Mine jewelflower is not commonly grown in gardens and may have very specific habitat requirements that are difficult to replicate.

What we do know is that as a California native, it likely prefers:

  • Mediterranean climate conditions
  • Well-draining soils
  • Minimal summer water once established

Conservation-Minded Alternatives

Given the rarity and conservation concerns surrounding Socrates Mine jewelflower, you might consider other California native jewelflowers or mustard family plants that can provide similar ecological benefits without the conservation risks. Many other Streptanthus species are more readily available and better suited for home gardens.

The Bottom Line

While the Socrates Mine jewelflower is undoubtedly a fascinating native plant, its critically imperiled status means it’s better admired and protected in its natural habitat than cultivated in home gardens. If you’re passionate about supporting this rare species, consider contributing to conservation organizations working to protect California’s endemic plants or participating in habitat restoration efforts.

Remember, sometimes the best way to love a plant is to ensure its survival in the wild rather than trying to bring it into our gardens. The Socrates Mine jewelflower serves as a reminder of how precious and fragile our native plant heritage can be.

Socrates Mine 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 brachiatus F.W. Hoffm. - Socrates Mine jewelflower

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