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Taxon  Report  
Amaranthus tuberculatus  (Moq.) J. D. Sauer
Common waterhemp
Amaranthus tuberculatus is an annual herb that is not native to California.
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
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Bloom Period
Subspecies and Varieties:
Genus: Amaranthus
Family: Amaranthaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Wetlands:
Arid West: Occurs usually in wetlands, occasionally in non wetlands
Mountains, Valleys and Coast: Occurs in wetlands

Name Status:
Accepted by PLANTS + POWO
Alternate Names:
PLANTSAcnida altissima var. prostrata
PLANTSAcnida altissima var. subnuda
PLANTSAcnida altissima
PLANTSAcnida concatenata
PLANTSAcnida subnuda
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Information about  Amaranthus tuberculatus from other sources
USDA PLANTS Profile (AMTU)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

[Wikipedia] Morphology: A distinguishing characteristic of tall waterhemp that sets it apart from similar members of the genus Amaranthus is the lack of hair on its stems and leaves. This characteristic gives the plant a bright, glossy appearance. (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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/16/2025).