Invasive Plants: Thistle Rosettes
Many thistles in the western United States are native species that generally go unnoticed as weeds. However, thistle species introduced from Europe, Africa, and Asia can be very aggressive [...]
Invasive Plants: Dame’s Rocket (Hesperis matronalis)
Dame’s rocket is a member of the Mustard family and is also known as dame’s violet. This native of Europe may be either a biennial or perennial, grows from 1 ½ to 4 feet tall, and has flowers [...]