from either side

[suprunp]

Eragon looked up at the shining expanse of gold. Embossed across the doors was a life-sized oak tree, the leaves of which formed an arching canopy that joined with the roots below to inscribe a great circle about the trunk. Sprouting from either side of the trunk’s midsection were two thick bundles of branches, which divided the space within the circle into quarters.
(C. Paolini; Inheritance)

Does the part in bold mean that there were two thick bundles of branches on one side and another two ones on the other?

Thanks.

[5jj]

It's not absolutely clear. If the leaves and the roots made a circle, then there would be a semi-circle on each side of the trunk. It would seem that you'd need only one bundle of branches on each side to divide each semi-circle into two halves, making a total of four quarters.