The Medieval Garden Enclosed

Left: Silybum marianum, the Marian thistle, is also known as milk thistle, because of the milky-white streaks on the spiny leaves. Right: The thistle appears outside and below the enclosure of the captive Unicorn, near the Madonna lily (Lilium candidum), another plant associated with the Virgin. Visit the Collection Database to see the detail in context and learn more about The Unicorn in Captivity.

While thistles were a thorn in the farmer’s side, then as now, virtually all plants were accorded medicinal value in the Middle Ages. Milk thistle (Silybum marianum ) was eaten as a vegetable, and is grown in a bed devoted to pottage plants here at The Cloisters, but it has a rightful place in the medicinal collection as well. Read more »

The most imposing of the several thistles we cultivate at The Cloisters, the stately cotton thistle has a presence that appeals to modern sensibilities. The silvery-white leaves are deeply cut and very handsome: the species name acanthium denotes their resemblance to the foliage of the acanthus. Some value cotton thistle as an ornamental in contemporary gardens, although others consider Onorpordum acanthium to be a weed. (A weed is a plant you don’t want, while an herb is a plant with a use. Many of the plants we grow in the gardens of The Cloisters are considered weeds in our time and place, but were herbs in the Middle Ages.) Once the purplish-pink flowers of the cotton thistle have withered, it is important to remove the heads so that the many seeds do not disperse to the four winds and colonize the world. Read more »