Ability to Respond Total:7 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Spread seems to be relatively slow and is typically in the northern part of the state.
1
Spread Amount
Open disturbed, often moist places, pastures, rangeland, open woodland and forests, and disturbed areas. Typically colonizes bare soil.
3
Damage
Notes
Score
Ecological
Can form relatively dense stands in some areas, but not a major problem in California. In Yellowstone National Park, was associated with closed canopies.
2
Agricultural
0
Infrastructure
0
Cultural
0
Health
Foliage, especially young leaves, and fruits contain pyrrolizidine alkaloids and are toxic to livestock, especially horses, when ingested in small amounts over time or in a single large quantity.
2
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
0
Cultural
0
Health
0
Total
8
Ability to Respond
Ease of Response
Notes
Score
Detection
Foliage can resemble a native plant and populations are often remove in forested areas.
3
Control
Control options are in place, but access can be difficult in many areas.
