Alexia-Pod was the name of various tentacles which were part of a large plant-like organism
Veronica Plant which lived underneath an Umbrella base in Antarctica where
Alexia Ashford conducted her research on the t-Veronica virus before one day injecting it into her own body and then entering a long period of deep sleep to allow the virus to work its way through her body at a steady pace which was the only way for a perfect mutation to occur.
When Alexia emerged as a perfect new being, she could assume control over the Alexia-Pod, using the tentacles to sense movement, detect far away people and objects, and even directly control them to use as weapons or restraints.
They resembled large tentacles and were most likely miles long in length - although the majority that were seen were only the very ends. They were strong and durable, but could be damaged by small arms fire or cut apart by sharp weapons.
Alexia also used the Alexia-Pod to assist in her various mutations. The tentacles were used to deliver additional biological material to her body when she required more. With this help she was able to mutate three additional times.
After Alexia's destruction at the hands of
Chris Redfield, it is unknown what happened to the Alexia-Pod and the underground
Veronica Plant. It is most likely that it was destroyed in an explosion after the area had self-destructed.
There have been other Veronica Plants such as the one found in the Amazon Rainforest but the tentacles were not present, but the plant did have the ability to directly infect people with the t-Veronica virus.