In　order　to　efficiently　manipulate　the　geometry　and　topology　information　of　virtual　plants,　which　includes　boundary　and　non-manifold　edges,　a　more　compact　representation　of　the　topology　information　was　proposed.　The　proposed　data　structure　makes　full　use　of　the　implicit　representations　among　vertices,　half-edges　and　triangular　faces.　The　index　of　the　face　and　the　implied　number　of　the　half-edge　are　encoded　into　an　unsigned　long　integer　based　on　half-edge　data　structure.　The　position　information　and　an　outgoing　half-edge　are　set　as　attributes　in　the　vertex　object,　the　vertex　pointer　and　the　opposite　half-edge　list　are　set　as　attributes　in　the　triangular　face　object.　The　topology　information　of　the　mesh　can　be　efficiently　queried　and　processed　by　decoding　the　half-edges　in　mapping　table.　The　test　of　the　topological　reconstruction　for　virtual　plant　was　done.　Compared　with　other　half-edge　data　structures,　the　memory　footprint　of　the　proposed　data　structure　is　reduced.　©　2018,　Beijing　China　Science　Journal　Publishing　Co.　Ltd.　All　right　reserved.