Jewel-flower
Streptanthus glandulosus
Last reviewed: October 2026
Jewel-flower (Streptanthus glandulosus) is a annual forb native to CA, OR. It blooms in April, May, and June. The flowers draw bees.
Toxicity unknown
Jewel-flower (Streptanthus glandulosus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
12"–30" H × 8"–14" W
Bloom
Apr, May, Jun
Native to
CA, OR
Pollinators
bees
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 458 programs across 44 states, each with a link to the provider and the date we last checked it.
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Browse plants for this ecoregion
A slender annual with clasping leaves and urn-shaped maroon-purple flowers held in loose clusters along upright stems, often found on serpentine and other unusual soils.
Growing Jewel-flower
Grow Jewel-flower in full sun and low water. Mature plants reach 12 to 30 inches tall and spread 8 to 14 inches wide.
Wildlife value
Host plant for Sara orangetip.
An important larval host plant for Sara's orangetip and other spring-flying white butterflies.
Common questions
- How much sun does Jewel-flower need?
- Jewel-flower grows best in full sun conditions.
- When does Jewel-flower bloom?
- Jewel-flower blooms in April, May, and June.
- Where is Jewel-flower native?
- Jewel-flower (Streptanthus glandulosus) is native to CA, OR, per vouchered herbarium specimen records and regional native plant society lists.
- What butterflies or moths does Jewel-flower host?
- Jewel-flower is a larval host plant for Sara orangetip.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Jewel-flower? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.