2. Native or Non-native
Not native to
California.
Native to the
Mediterranean &
North Africa.
Native to southern
Europe & Pakistan.
First introduced to
California in 1930’s.
3. Evolution
Spines to keep away
grazing animals like deer.
Seeds that can be
dispersed by wind,
animals, water &
automobiles.
Reproduce quickly &
efficiently by way of seeds.
Live in environments that
have been disturbed by
urban development.
Resilient plant that can
thrive even when cut down
to six inches.
4. How this plant fits in the world
Noxious
weed( noxious means
invasive).
Overcrowds native
species & lowers
chances of other
plants surviving.
Causes damage &
harm to forage
species.
Controlling the thistle
when the thistle is
found in urban
development is costly
& impractical.
