2016 Steve Matson 2016 Steve Matson 2016 Steve Matson 2016 Steve Matson 2016 Steve Matson 2016 Steve Matson 2019 Mary Conway 2019 Mary Conway 2022 David Strauch 2020 Diane Etchison 2022 David Strauch 2022 David Strauch 2022 David Strauch 2019 Mary Conway 2018 Adam Chasey 2019 Patrick Furtado 2019 Patrick Furtado 2020 R.A. Chasey 2020 R.A. Chasey 2020 R.A. Chasey 2017 Ron Vanderhoff 2021 R.A. Chasey 2021 Mary Conway 2018 Richard Spjut 2020 Diane Etchison 2020 Ron Vanderhoff 2020 David Greenberger 2016 Steve Matson 2021 R.A. Chasey 2021 Suzanne L. Weakley 2022 Suzanne L. Weakley 2017 Neil Uelman 2017 Neil Uelman 2017 Neil Uelman 2017 Neil Uelman 2017 Neil Uelman 2017 Neil Uelman 2017 Neil Uelman 2018 Andy Jones 2021 R.A. Chasey
Ambrosia chamissonis is a perennial herb that is native to California, and also found elsewhere in western North America.
[Wikipedia] Reproduction: The plant is monoecious, with male and female flowers on each individual. Staminate (male) flower heads containing many pale colored florets occur at the tip of the inflorescence, with pistillate (female) flower heads clustered below them. Each pistillate head contains a single tiny flower which develops into a fruit. The fruit is a brown bur up to a centimeter wide covered in sharp spines. (link added by Mary Ann Machi)
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2016 Steve Matson:!2016 Steve Matson:!2016 Steve Matson:!2016 Steve Matson:!2016 Steve Matson:!2016 Steve Matson:!2019 Mary Conway:!2019 Mary Conway:!2022 David Strauch:!2020 Diane Etchison:!2022 David Strauch:!2022 David Strauch:!2022 David Strauch:!2019 Mary Conway:!2018 Adam Chasey:!2019 Patrick Furtado:!2019 Patrick Furtado:!2020 R.A. Chasey:!2020 R.A. Chasey:!2020 R.A. Chasey:!2017 Ron Vanderhoff:!2021 R.A. Chasey:!2021 Mary Conway:!2018 Richard Spjut:!2020 Diane Etchison:!2020 Ron Vanderhoff:!2020 David Greenberger:!2016 Steve Matson:!2021 R.A. Chasey:!2021 Suzanne L. Weakley:!2022 Suzanne L. Weakley:!2017 Neil Uelman:!2017 Neil Uelman:!2017 Neil Uelman:!2017 Neil Uelman:!2017 Neil Uelman:!2017 Neil Uelman:!2017 Neil Uelman:!2018 Andy Jones:!2021 R.A. Chasey:!
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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. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 02/16/2025).