Cycadeoidaceae

Cycadeoidaceae refers to an extinct family of plants that flourished during the Jurassic and Cretaceous periods. These plants, also known as cycadeoids, shared some characteristics with modern cycads but had distinct reproductive structures.12

Key features of Cycadeoidaceae include:
* Appearance: They possessed stout, barrel-shaped trunks covered in persistent leaf bases, with a crown of leaves at the top.3
* Reproduction: Unlike cycads, their reproductive cones were embedded within the trunk among the leaf bases. These cones contained both pollen and ovules and were sometimes surrounded by petal-like structures.12
* Evolutionary Link: Some scientists believe cycadeoids may be evolutionarily linked to angiosperms (flowering plants) due to their reproductive structures, though this is debated.23
* Extinction: Cycadeoids eventually became extinct by the end of the Cretaceous Period.34