Help Marin Agricultural Land Trust (MALT) track the spread of the top five noxious plant species invading Marin County rangelands. Data collected will help MALT, landowners, land managers address the growing impacts of these species local farms and ranches.

Please make an observation when you see the following species in the agricultural areas of Marin County:

1. Woolly distaff thistle (Carthamus lanatus)
2. Purple star thistle (Centaurea calcitrapa)
3. Rosy sandcrocus (Romulea rosea)
4. Gorse (Ulex europaeus)
5. French broom (Genista monspessulana)
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