Related Clues:

• Beech or birch
• One may undergo surgery
• Sloth's hangout
• Theme of the puzzle
• Genealogy chart
• Orchard unit
• Family portrait, of sorts
• Pecan or walnut
• Bat's beginning
• Part of a copse
• Mimosa, for one
• Genealogical chart
• See 9-Across
• Type of surgeon
• Arborist's concern