Unlike other thistle plants that establish deep taproots ... is a stunning, biennial wildflower that regrettably moonlights as an invasive weed in the U.S. That's because its seeds remain viable ...

The Sacramento Mountains thistle is a rare purple flower than can grow to be six feet tall and lives only in wet, high-elevation habitats in the Sacramento Mountains near the town of Cloudcroft, New ...

The flowering plant is also commonly referred to as Mary thistle, holy thistle, Marian thistle, wild artichoke, Our Lady’s thistle, and St. Mary’s Thistle. Milk thistle is native to Europe and ...

The lobes in each leaf of prickly sow thistle do not tend to cut in so close to the midrib of the plant as in sow thistle leaves. It could also perhaps be confused with hawksbeard due to its leafy ...

The Sacramento Mountains thistle is a rare purple flower than can grow to be six feet tall and lives only in wet, high-elevation habitats in the Sacramento Mountains near the town of Cloudcroft, New ...