Their leaves fell with other trees

with leaf scars distributed along the main twigs, with those leaf scars and lateral buds usually numbering/arranged:
1-at-a-node,
arranged
╧╤╧╤
alternate
or spiral
or
2-at-a-node,
arranged
═╪═╪
opposite
or
3+-at-a-node,
arranged ═❋═❋
whorled
hardy catalpa
Catalpa speciosa
:

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plant terminology