North America Native Plant

Secund Jewelflower

Botanical name: Streptanthus glandulosus secundus var. secundus

USDA symbol: STGLS3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Streptanthus secundus Greene (STSE6)   

Secund Jewelflower: A Rare California Native Worth Protecting in Your Garden If you’re looking to add a touch of delicate beauty to your California native plant garden while supporting conservation efforts, the secund jewelflower might just be the perfect choice. This charming annual wildflower, scientifically known as Streptanthus glandulosus secundus ...

Rare plant alert!

Region: Conservation status by state

Status: S4T2T3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ 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) ⚘ 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. ⚘ 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 ⚘

Secund Jewelflower: A Rare California Native Worth Protecting in Your Garden

If you’re looking to add a touch of delicate beauty to your California native plant garden while supporting conservation efforts, the secund jewelflower might just be the perfect choice. This charming annual wildflower, scientifically known as Streptanthus glandulosus secundus var. secundus, offers gardeners a unique opportunity to cultivate a piece of California’s natural heritage right in their backyard.

What Makes Secund Jewelflower Special?

The secund jewelflower is a true California native, found exclusively within the Golden State’s diverse landscapes. As an annual forb (that’s gardener-speak for a non-woody herbaceous plant), it completes its entire life cycle in just one growing season, making it a fascinating addition to any native plant collection.

What really sets this plant apart is its distinctive flowering pattern. The delicate purple to pink flowers arrange themselves in a gracefully curved, one-sided cluster called a raceme – hence the name secund, which refers to this characteristic arrangement where all the flowers face the same direction.

Where Does It Grow?

This lovely wildflower calls California home, thriving in the state’s Mediterranean climate and diverse ecosystems. You’ll find it naturally occurring throughout various regions of California, from the Sierra Nevada foothills to parts of the Central Valley.

A Word About Conservation

Here’s something important every gardener should know: secund jewelflower has a conservation status that suggests it may be of concern. This makes it even more valuable as a garden plant, as responsible cultivation can help support the species while you enjoy its beauty. If you decide to grow this special plant, make sure you source seeds or plants from reputable native plant nurseries that collect responsibly and sustainably.

Why Grow Secund Jewelflower in Your Garden?

There are several compelling reasons to consider adding this native beauty to your landscape:

  • Pollinator magnet: The small, delicate flowers attract native bees and other beneficial pollinators, supporting local ecosystems
  • Low maintenance: Once established, this drought-tolerant native requires minimal care
  • Unique aesthetic: The curved flower clusters add an interesting architectural element to wildflower gardens
  • Conservation contribution: Growing native plants helps preserve California’s botanical heritage
  • Perfect for naturalized areas: Ideal for creating authentic wildflower meadows and natural landscapes

Growing Conditions and Care

Secund jewelflower is surprisingly easy to grow once you understand its preferences. This hardy annual thrives in USDA hardiness zones 8-10, making it well-suited to most of California’s climate regions.

Sunlight: Provide full sun to partial shade for best results. In hotter inland areas, some afternoon shade can be beneficial.

Soil: Well-draining soil is essential. This plant doesn’t like wet feet and prefers the kind of lean, rocky soils found in its natural habitat.

Water: Once established, secund jewelflower is quite drought-tolerant. During its growing season, provide moderate water, but avoid overwatering.

Planting and Care Tips

Getting started with secund jewelflower is straightforward, though timing is everything:

  • When to plant: Direct seed in fall for spring blooms, mimicking natural rainfall patterns
  • Soil preparation: Ensure excellent drainage – amend heavy clay soils with sand or gravel if needed
  • Spacing: Allow plants room to develop their natural form without crowding
  • Watering: Water gently during germination, then reduce frequency as plants establish
  • Fertilizing: Skip the fertilizer – these natives prefer lean conditions
  • Maintenance: Allow plants to self-seed for natural regeneration

Perfect Garden Companions

Secund jewelflower looks fantastic when planted alongside other California natives. Consider pairing it with native grasses, lupines, poppies, and other wildflowers to create an authentic and vibrant native plant community.

The Bottom Line

While secund jewelflower may require a bit more attention to sourcing due to its conservation status, it’s absolutely worth the effort for gardeners committed to native plant gardening. This unique annual offers delicate beauty, supports local pollinators, and connects your garden to California’s rich botanical heritage. Just remember to source responsibly and enjoy watching this special plant complete its annual dance in your garden.

By choosing to grow secund jewelflower, you’re not just adding beauty to your landscape – you’re participating in the important work of plant conservation, one garden at a time.

Secund 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 glandulosus Hook. - bristly jewelflower

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