Introduced species: Chickweed (Stellaria media) Description: Chickweed is a very common garden plant, behaving as either an annual or a perennial depending on the local climate; our mild winters mean […]

Introduced species: Dock (Rumex crispus and R. obtusifolius) Characteristics: These two common dock species are perennial members of the buckwheat family. Curly dock (R. crispus) may grow up to 1

Non-native: English laurel (Prunus laurocerasus) Description: English laurel–aka cherry laurel or common laurel–is, confusingly, neither English nor a laurel, but a species of cherry native to the area around the

Exotic species:  Milk thistle (Silybum marianum) Characteristics:  Milk thistle is a sparsely-branched, biennial thistle, growing up to 6 ft. (2 m) tall. The alternate, deeply-lobed leaves may reach 20 in.

Introduced species:  English hawthorn (Crataegus monogyna) Characteristics:  English (or common) hawthorn is a broadly spreading shrub or small tree, typically up to 6 m (20’) tall, with a dense crown.