Ubiquity: Uncommon or common?Distritution: N1/2 & SW1/4 except Napa Marsh
Plant Communities: Blue Oak Woodland, Regular Chaparral, Ruderal
Habitats: Dry, sunny to shaded, weedy creeksides/waste areas; & in disturbed places like roadsides/fields; in most geologic formations except serpentine
Elevations: 300-2400'
Comments: Non-native. Noxious weed. Includes T. japonicaUpdated: 2/19/98
Ubiquity: Very commonDistritution: Throughout except Napa Marsh
Plant Communities: Valley Oak Riparian, Regular & Serpentine Chaparral, Ruderal
Habitats: Dry, sunny to shaded, rocky or not, ultramafic or not, grassy or weedy riverbeds/streamsides/roadsides/waste areas; in cultivated places like fields; & in most geologic formations
Elevations: 80-2200'
Comments: Non-native. Noxious weed. Some may be misidentified T. arvensisUpdated: 2/19/98