logo Calflora, a 501c3 non-profit
Taxon  Report  
Streptanthus longisiliquus  G. Clifton & R. E. Buck
Long-fruit jewel-flower
Streptanthus longisiliquus is a perennial herb that is native to California.
California Rare Plant Rank: 4.3 (limited distribution).
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Observation Search
(130 records)
yellowone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Streptanthus
Family: Brassicaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
CNPSStreptanthus longisiliqus
Information about  Streptanthus longisiliquus from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[Wikipedia] Range, Description: Streptanthus longisiliquus (orth. var. S. longisiliqus) is a species of flowering plant in the mustard family known by the common name long-fruit jewelflower.[1] It was first described to science in 2007.[2] It is endemic to northern California, where it is known from Butte, Tehama, and Shasta Counties. It can be found in forest and woodland habitat in mountains and foothills. It is a short-lived perennial herb producing a few-branched stem up to 1.2 to 1.5 meters in maximum height. It is mostly hairless except for some light hairs on the inflorescences and sometimes the leaf petioles. The basal leaves have oval or spoon-shaped blades up to 10 centimeters long, usually with smooth edges. Leaves higher on the stem are oval or oblong and lack petioles, their bases often clasping the stem. Flowers occur at intervals along the upper stem. Each flower has a bell-shaped calyx of sepals which yellow-green at the base and purplish at the tip, measuring under a centimeter in length. The petals emerging from the end are brownish or purplish with greenish bases. The fruit is a flattened, curving silique that can be quite long even for the genus, measuring up to 15 centimeters in length. (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/05/2023).