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Taxon  Report  
Lessingia arachnoidea  Greene
Crystal springs lessingia
Lessingia arachnoidea is an annual herb that is native to California, and endemic (limited) to California.
also called Lessingia micradenia var. arachnoidea
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
~69 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Lessingia
Family: Asteraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 6 - strict endemic

Habitat: disturbed

Communities: Northern Coastal Scrub, Foothill Woodland, Valley Grassland

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
JEF + PLANTSLessingia hololeuca var. arachnoidea
CNPS + PLANTSLessingia micradenia var. arachnoidea
Information about  Lessingia arachnoidea from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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ID Tips on PlantID.net

[Wikipedia] Habitat, Seed Longevity: Plants need bare soil or soil without any exotic weed competition to thrive, and can even grow in the bare soil of well worn trails. Late-flowering from August to October, and one of the last of the summer California wildflowers to bloom. Plants are able to grow without any rainfall or any moisture in the ground around their roots, surviving by absorbing dewfall at night through their leaves. Ripe seeds germinate readily, 40% in three days and 80% within 15 days. When managing or restoring this species, the estimated longevity of seeds in the soil is between 100 and 250 years. (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: 07/20/2024).