Dogwood or palm (4)
I believe the answer is:
tree
I believe this clue is a double definition.
'dogwood' is the first definition.
(thesaurus)
'palm' is the second definition.
(thesaurus)
(Other definitions for tree that I've seen before include "Genealogy chart" , "Holly, perhaps" , "Genealogist's graphic" , "Large, woody perennial plant" , "Theme" .)