Calflora Taxon Report
Tonestus peirsonii  (D. D. Keck) G. L. Nesom & D. R. Morgan
Peirson's haplopappus, Peirson's serpentweed
photo on Calflora
2014 Steve Matson
photo on Calflora
2014 Steve Matson
photo on Calflora
2014 Steve Matson
photo on Calflora
2012 Steve Matson
photo on Calflora
2012 Steve Matson
photo on Calflora
2012 Steve Matson
photo on Calflora
2011 Steve Matson
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2025 Dana York
photo on Calflora
2025 Dana York
photo on Calflora
2022 richard mcneill
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2023 Chloe and Trevor Van Loon
photo on Calflora
2022 John Rawlings
photo on Calflora
2014 Steve Matson
photo on Calflora
2012 Steve Matson
photo on Calflora
2011 Steve Matson
photo on Calflora
2011 Steve Matson
photo on Calflora
2011 Steve Matson
photo on Calflora
2022 richard mcneill
Tonestus peirsonii is a perennial herb that is native to California, and endemic (limited) 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
DJJJASONAFMM

Bloom Period
Genus: Tonestus
Family: Asteraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot
Habitat: ridges

Communities: Subalpine Forest, Alpine Fell-fields

Name Status:
Accepted by JEF + CNPS + PLANTS
Alternate Names:
JEF + PLANTSHaplopappus eximius ssp. peirsonii
JEF + CNPS + PLANTSHaplopappus peirsonii
JEFLorandersonia peirsonii
POWOToiyabea peirsonii
External links:

[Wikipedia] Limited Range: The plant is endemic to California, where it is known only from the Eastern High Sierra Nevada, and the White Mountains across Owens Valley to the east, both within Inyo National Forest. (link added by Mary Ann Machi)

Suggested Citation
“Calflora - Taxon Report.” The Calflora Database, a non-profit organization. .

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