What might look like one big pecan split in two is actually two fully formed nuts joined at the base (photo above). These twin pecans had their genesis all the way back during pistillate flower formation when a genetic miscue led to the creation of a double flower. A double flower has two stigmas, two ovaries but a fused shuck. At harvest, a twin nut falls free from its shared husk revealing a pair of nuts with shells fused only at the very base. Crack open the nuts in the twin and you will find two kernel halves in each pecan just like a normal pecan.