The basal foliage of the Italian eryngo is evergreen in milder climates and looks rather like leathery thistle leaves. In summer, the well branched stems carry small egg-shaped flower heads ...

though doesn’t have spines like true thistles. The sow thistle has quite a succulent stem when it flowers, and the foliage oozes a milky sap when cut. It is most likely to be confused with a closely ...

Native to Europe but common in the U.S. today as well, milk thistle is a flowering plant in the daisy (Asteraceae) family of flowers. This is the same plant family that has more than 30,000 other ...

Like many other biennial invasives, bull thistle is able to produce a large seed bank that can remain viable for ... although repeated cuts - one early season before flowers bloom, and one late season ...