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Western ragweed Ambrosia psilostachya The inflorescence is borne on a spike at the top of the stem. The plant is monoecious, with the inflorescence carrying both staminate (male) flower heads at the top and the pistillate (female) heads below and in the axils of leaves. Native to California Back to Asteraceae of Orange County, California |
Staminate (male) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/4/2017. © Peter J. Bryant |
Staminate (male) flower heads (above) and pistillate (female) flower heads below. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Staminate (male) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/4/2017. © Peter J. Bryant |
Staminate (male) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/4/2017. © Peter J. Bryant |
Staminate (male) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Staminate (male) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Leaves. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/4/2017. © Peter J. Bryant |
Leaves. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Pistillate (female) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Pistillate (female) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Pistillate (female) flower heads and leaves. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Pistillate (female) flower heads. James Dilley Preserve, Laguna Beach, Orange County, CA. 9/29/2019. © Peter J. Bryant |
Just E Olympiad nr. Jeronimo, Mission Viejo, 11-30-14. © Ron Vanderhoff. |