Cirsium foliosum, commonly known as Leafy Thistle or Elk Thistle, is a biennial or perennial herb that is native to subalpine meadows, alpine tundra, and open forest clearings across Alaska, Yukon, Northwest Territories, Alberta, British Columbia, and Northwestern United States. It typically grows up to 28 inches tall and is characterized by its spiny foliage and several flowering heads that bear white or pale pink disc florets. The blooming period occurs in late spring to early summer, after which the plant may die, having completed its life cycle. The flowers are attractive to a variety of pollinators.

Leafy Thistle is valued for its unique appearance and its role in supporting wildlife. It is not commonly cultivated in gardens but may be of interest for naturalized areas or wildlife gardens. In cultivation, it requires well-drained soils and can tolerate a range of light conditions from full sun to part shade. While not aggressive, it can self-seed if conditions are favorable. The roots and stems are edible and have been traditionally used as a food source by indigenous peoples and wildlife such as bears, deer, and elk. Care should be taken when handling this plant due to its spines.CC BY-SA 4.0