2014 Plants of the Month

November 2014 Plant of the Month

Photo by Vernon Smith
Dittrichia graveolens (stinkweed)
by Doreen Smith

Dittrichia graveolens (stinkweed)

The invasive stinkweed, Dittrichia graveolens, was not even mentioned in the 1993 Jepson Manual because it had not been recognized as a non-native. Any reports existing then were of the opinion that it was some sort of tarplant.
Now it is a serious menace, starting to spread along highways and into rancher’s fields.
The California Invasive Plant Council (Cal-IPC) indicates that it “can form dense stands in late summer/early fall with few plant competitors. It grows rapidly late in the year from small rosette to over 1meter tall in open, disturbed, riparian, non-native grasslands, and sites which may include some native species.”
More information can be found at the following links.

California Invasive Plant Council (Cal-IPC)
Invasive Species Early Detection Program (ISED)

 Click on each image to see a larger version.

Dittrichia graveolens IMG 4575sm Dittrichia graveolens IMG 4573sm
Dittrichia graveolens (stinkweed) Dittrichia graveolens (stinkweed)

Dittrichia graveolens IMG 4540sm









               Dittrichia graveolens (stinkweed)

Photos by Vernon Smith


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