Cycads (Class Cycadopsida) represent the most primitive seed plant living today. Cycads are also commonly known as sago palm even though it is very distantly related to a palm (Class Liliopsida), which is actually a flowering plant. Cycads are tropical or sub-tropical plants with a thick, woody trunk with a crown of large, usually pinnate evergreen leaves. Seeds are borne in cones that emerge from the center of the crown atop the plant.