logo Calflora, a 501c3 non-profit
Taxon  Report  
Streptanthus insignis  Jeps.  ssp. lyonii  Kruckeb. & J. L. Morrison
Arburua ranch jewel flower,   Arburua ranch jewelflower
Streptanthus insignis ssp. lyonii is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
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
~58 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle

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

Ultramafic affinity: 3.3 - strong indicator

Communities: Northern Coastal Scrub

Name Status:
Accepted by JEF + CNPS + PLANTS

Information about  Streptanthus insignis ssp. lyonii 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

[efloras.org] Description, Habitat, Range: Racemes: terminal cluster of sterile flowers pale yellow or purplish. Flowers: sepals of fertile ones greenish yellow or purplish; petals lemon yellow or yellowish white. Fruit valves moderately to densely hispid. 2n = 28. Flowering Apr-May. Serpentine outcrops in arid grassland, oak woodland; of conservation concern; 200-900 m; Calif. Subspecies lyonii is known from Merced County. Kruckeberg and Morrison described subsp. lyonii based on plants with an exclusively greenish yellow terminal cluster of sterile flowers, and discussed a sympatric form with greenish yellow sepals and a purple terminal cluster as a ?bicolor? form. Subsequent collections show that plants with only a greenish yellow terminal sterile cluster are absent in some years, and the ?bicolor? form is here included in subsp. lyonii. (link added 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 07/23/2024).