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The blue flag or Iris versicolor is an iris with medicinal uses.

Blue Flag

The blue flag or Iris versicolor is an iris with medicinal uses.

Dill (Anethum graveolens) is a short-lived perennial herb. It is the sole species of the genus Anethum, though classified by some botanists in a related genus as Peucedanum graveolens.

Dill

Dill (Anethum graveolens) is a short-lived perennial herb. It is the sole species of the genus Anethum,…

"Mandrake is a perennial herb. From the rude resemblance of the bifurcated root to the human figure many superstitious notions have gathered round this plant."—(Charles Leonard-Stuart, 1911)

Mandrake

"Mandrake is a perennial herb. From the rude resemblance of the bifurcated root to the human figure…

An illustration of a flowering branch of common mare's tail; a, flower before athesis; b, flower after athesis; c, fruit. The Common Mare's tail, Hippuris vulgaris, is a common aquatic plant of Eurasia and North America. The species is also sometimes called Horsetail, a name which is better reserved to the Horsetails of genus Equisetum. These are unrelated to the water plant, though there is some resemblance in appearance.

Common Mare's Tail

An illustration of a flowering branch of common mare's tail; a, flower before athesis; b, flower after…

The spotted wintergreen or Chimaphila maculata is a perennial herb used for medicinal purposes.

Spotted Wintergreen

The spotted wintergreen or Chimaphila maculata is a perennial herb used for medicinal purposes.