When are maples usually tapped ?
" A. grosseri , A. hersii , A. laisuense " ) - Père David 's Maple , Hers 's Maple " Acer forrestii " " Acer laxiflorum " " Acer maximowiczii " - Maximowicz 's Snakebark Maple " Acer metcalfii " " Acer micranthum " " Acer morifolium " " Acer morrisonense " ( syn.