Non-native and a rapidly spreading pest in the East Bay . Favors disturbed areas . Note strong scent like a tarweed . Tiny flowers in late summer into autumn .
This is a recent split of Common Dandelion . Note sharp-toothed leaves and reddish ( not olive ) seeds . Non-native .
From past files .Summit Trail , up the trail from the water tower . I attempted to partly eradicate this non-native species from the park . I think it was Dianne Lake or someone from UC-Berkeley who finally identified this .
Seeking to document observations of non-native introduced species outside of their original homelands. Observations must be of organisms that were introduced to an area by humans recently (established populations of introduced species are okay), not natural shifts in range, or migrations.