Ability to Respond Total:10 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
The majority of seeds fall within a few meters of the parent plant, but wind can carry some seeds far away to form new populations.
4
Spread Amount
Very common in oak woodlands throughout the state.
2
Damage
Notes
Score
Ecological
Capable of displacing native species with 100% coverage in small populations.
1
Agricultural
Commonly grows on rangeland and can replace palatable forage.
1
Infrastructure
No known damage to infrastructure.
0
Cultural
Spines are painful, which creates a barrier for hiking and other recreational activities.
1
Health
Causes low level physical injury through laceration from spines and contact dermatitis in some people
1
Benefit
Notes
Score
Ecological
Pollinated by bees. Seeds are predated by ants
1
Agricultural
No agricultural value
0
Infrastructure
No benefit to infrastructure
0
Cultural
No cultural benefit
0
Health
No health benefits
0
Total
9
Ability to Respond
Ease of Response
Notes
Score
Detection
Requires a relatively minor investment of human and financial resources. Taxon and propagules are readily apparent and are spread only through limited, known pathways
4
Control
several control strategies are effective including mechanical and chemical and seeds rarely persist in the soil seedbank for more than a few years.
3
Tools in Place
Notes
Score
Entry
Listed as a noxious weed on the CCR 4500 Noxious Weeds List
