Puzzle on 13 January, the promised answer.
GORSE = 57, G=13, O=9, R=25, S=7, E=3.
Start with Chestnut, then Ash, Spruce, Pine, Acer, etc.
Extra words, though not necessary will make it easier, but not by much, HOLLY = 52 and/or WILLOW = 83.
George Norris