Cordaites are Carboniferous and Permian seed plants that are considered to be related to conifers (or they may be the earliest conifers). Cordaites are reconstructed as growing as trees and woody shrubs, and some have proposed that they even evolved a mangrove habit with prop roots. As trees, evidence from petrified logs and stumps indicates that Cordaites could reach over 100 feet (33 meters) tall and over 3 feet (1 meter) in diameter. Cordaites grew both on dry land and in wet swamps throughout their range.