Streptanthus glandulosus subsp. josephinensis
Josephine county jewelflower
(c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda · licence
Family: Brassicaceae · Type: Annual · Native
Streptanthus glandulosus subsp. josephinensis (Josephine county jewelflower) is a native California annual in the Brassicaceae family, recognized by distinctive pale yellow sepals and white petals.
Josephine county jewelflower is a California native annual found in southwestern Oregon in serpentine outcrops within montane chaparral and Jeffrey pine woodland at an elevation of 594 meters. Flowering from May to July, this plant produces white flowers with distinctive purple veins, approximately 7 to 8 millimeters long. Growing with slender stems 17 to 38 centimeters tall, it is moderately hairy near the base and becomes smooth towards the top. Its cauline leaves are sparsely hairy, with flat distal leaves showing distinctive dentate edges. The flower has pale yellow sepals and emerges in a one-sided, straight inflorescence axis.
Identification and appearance
Key characters: 19 sympatric species; distinctive pale yellow sepals and white petals
Habitat and range
Habitat: Serpentine outcrops in montane chaparral, Jeffrey pine woodland
Elevation: 594 m
Outside California: southwestern Oregon
Bloom period
Streptanthus glandulosus subsp. josephinensis blooms May-Jul.
How to tell it apart
vs Caulanthus: Seed pods are flattened like sword blades versus cylindrical tubes in Caulanthus.; vs Boechera: Robust plants often over 2.5 feet with large flowers (sepals 4-8mm) versus more delicate habit.; vs Claytonia: Mustard family with 4 petals and 6 stamens versus Claytonia with 5 petals.; vs Silene: Mustard family with seed pods versus Silene with inflated capsules and opposite leaves.; vs Lonicera: Herbaceous mustard with alternate leaves versus woody vine with opposite leaves.
Frequently asked questions
Is Streptanthus glandulosus subsp. josephinensis native to California?
Yes. Streptanthus glandulosus subsp. josephinensis is native to California (recorded as native).
When does Streptanthus glandulosus subsp. josephinensis bloom?
Streptanthus glandulosus subsp. josephinensis blooms May-Jul.
What plant family does Streptanthus glandulosus subsp. josephinensis belong to?
Streptanthus glandulosus subsp. josephinensis is in the Brassicaceae family, genus Streptanthus.
What habitat does Streptanthus glandulosus subsp. josephinensis grow in?
Streptanthus glandulosus subsp. josephinensis grows in Serpentine outcrops in montane chaparral, Jeffrey pine woodland.
Related species
Other California species in the same genus, family, or bioregion.
- Streptanthus glandulosus subsp. niger — Tiburon jewelflower
- Streptanthus glandulosus subsp. pulchellus — Mount tamalpais bristly jewelflower
- Streptanthus glandulosus subsp. raichei — Raiche's jewelflower
- Streptanthus glandulosus subsp. secundus — One-sided jewelflower
- Streptanthus glandulosus subsp. sonomensis — Uncommon jewelflower
- Streptanthus gracilis — Alpine jewelflower
Sources: Jepson eFlora · CalPhotos
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.