Spruces are large trees , from about 20 -- 60 metres ( about 60 -- 200 feet ) tall when mature , and can be distinguished by their whorled branches and conical form . The needles , or leaves , of spruce trees are attached singly to the branches in a spiral fashion , each needle on a small peg-like structure called a `` pulvinus '' .
Spruces are large trees , from 20 -- 60 ( -- 95 ) m tall when mature , and can be distinguished by their conical form and their needles , that are attached singly to the branches in a spiral fashion .