Generally the thing to look for in living cananbis plants when attempting to identify it's species is to look at it's leaflets. The longer, narrow leaflets are inherent to cannabis sativa whereas the shorter, wider leaflets are inherent to cannabis indica.

Another thing to look for when identifying the species of a living cannabis plant is to look at it's color. Due to the geological position of landrace cannabis indica [ 30° ~ 50° North/South latitude ], it possesses a visibly darker green appearance in comparison to cannabis sativa due to more chlorophyll on the leaf surfaces. Landrace cannabis sativa, which grows comfortably anywhere on the equator [ 30° North/South latitude ], possesses less chlorophyll on it's leaflets than cannabis indica, but does not require the additional chlorophyll because it's receiving slightly more intense radiation.

It'd be very difficult to find the exact species of your bud, but you could generally say that sativa varieties will have more spacing between the nodes. Hope you have a stalk of buds and not just nugs, then.