Native Plants

Secund Jewelflower

Streptanthus glandulosus secundus var. secundus

USDA symbol: STGLS3

annual forb

Lower 48 states: native

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 ...

Secund Jewelflower may be listed as rare in your area.
Global Conservation Status

Status: S4T2T3Q | Apparently Secure: Uncommon but not rare, and usually widespread. Possible 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.

  • Species observed
  • No observations

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.

Streptanthus glandulosus secundus var. secundus is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Streptanthus glandulosus secundus var. secundus is also known as:

Streptanthus secundus | USDA symbol: STSE6

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Dilleniidae
Order: Capparales
Family: Brassicaceae Burnett - Mustard family
Genus: Streptanthus Nutt. - twistflower

Species: Streptanthus glandulosus Hook. - bristly jewelflower

Subspecies: Streptanthus glandulosus Hook. ssp. secundus (Greene) Kruckeb. - secund jewelflower
Variety: Streptanthus glandulosus Hook. ssp. secundus (Greene) Kruckeb. var. secundus - secund jewelflower

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