The Giant dioon (Dioon spinulosum) belongs to Cycadaceae (the Cycad family). It is a small evergreen tree that is native to Veracruz and Oaxaca, Mexico. This tree grows on limestone cliffs and rocky hillsides in the tropical rainforests, and to 12 m in height. The leaves are pinnate compound, grow to about 1.5-2.1 m in length and radiate out from the trunk. The 120-240 leaflets on each leaf are small and flat, have small thorns and taper to a sharp point.