On first glance, the meadow thistle looks a bit like a knapweed - it's not as prickly as other thistles and only carries one pinky-purple flower head. It can be found in damp meadows and grasslands.

Flower stems are branched with spiny wings extending to the ... Leaves are narrower and wavier than musk thistle. The spiny leaves extend onto and around the stem, giving it the appearance of clusters ...

The Canada thistle can be distinguished from other thistles by its small purple flower, horizontally growing roots, and lack of stem spines. It aggressively spreads by roots and seeds. Small root ...

grows as a typical thistle rosette over winter, then develops an upright flower stem in spring, from which seed is produced and falls into the soil where it spends summer. Winged thistle looks and ...

Sow thistle is commonly found in crops, gardens and waste areas. As with many members of the Asteraceae family, it starts life as a rosette, and then bolts to form an upright flower stem. Sow thistle ...

Milk thistle has long been used in Europe as a food. De-spined leaves were used in salads, while stalks, roots and flowers were cooked. Seeds were used as coffee substitute. It has been used as a ...

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 ...