Native to what is now North America, Pertica was a land plant that lived during the Early to Middle Devonian, around 420 - 380 million years ago. Its remains were first discovered in 1972 at the Trout Valley Formation in Maine, USA, and more specimens have also been discovered in Canada since then.

Pertica grew to about 1 metre in height. It had multiple, photosynthesizing branch-like structures growing from a very obvious stem, and many small clusters of sporangia.

A clearly defined stem (with lateral branches) represents an evolutionary milestone in the history of land plants, and Pertica is thought to have been closely related to some of the lineages that gave rise to ferns and seed plants.