Aborkineticism is an Adept discipline that has something to do with plants. Quibble said, users of this discipline would talk to plants so they grew better.
When Temper Fray was running away from the Anti-Sanctuary he entered the house of two Aborkineticists and their baby. They said that they didn't pose any threat to the intruders, indicating that this ability can't be used for fighting.
This discipline is probably not well known, as Memphis (and probably Lethe) didn't know what Aborkineticism was.