The turret voltflora split from its ancestor, the voltflora. Due to island gigantism, it has grown to almost 10 times its ancestors size. In order to spread its magnetic cellballs even farther it has evolved a cannon-like barrel. Inside the barrel it has rail-like magnets with opposite charges. When quickly turn on it propels the cellball out of the barrel much like a railgun.
Like their ancestor they have a battery-like organ within their trunks. They get electricity by a round photovoltaic ring at the base of their trunk. Unlike photosynthesis the photovoltaic converts the suns rays into electricity and is stored in the trunk-battery. This trunk-battery can store up a lot more electricity than its ancestor could. It uses copper oxide in the battery-like organ.
In addition, the battery is used in to power its roots. They will attract iron from the soil and bring it towards the roots. It needs the iron to build its iron cells. To keep any "iron fauna" from eating it, it can give a mild shock or even repel them with its electromagnetic plate. Note that it is a weak electric charge so only small "iron fauna" would notice.