i often do a set of tree songs..
maple's lament (laurie lewis)
Piney Wood Hills (buffy St. M.)

and this one--not yet mentioned i think
bristlecone pine

written by www.hughprestwood.com/

recorded also by www.jimsalestrom.com/bristlecone.html
bryanbowers.com/ bryan bowers is a master auto harp player and it is the title song of his latest recording

also Watching the apples grow...Stan Rogers
and Settin' chokers in the god damn rain...