The document defines key terms used to describe the structure of trees and forests, including crown, canopy, understory, and overstory. It then provides descriptions of several tree species, including their identifying characteristics and differences between similar species. Key points of identification are mentioned for species such as sycamore, plane trees, oaks, and elms. Reproductive structures are defined for terms like dioecious and monoecious.

1.
Crown-­‐
The
upper
mass
or
head
of
a
tree,
shrub,
or
vine,
including
branches
with
foliage.
Canopy-­‐
1. The
foliar
cover
in
a
forest
stand
consis:ng
of
one
or
several
layers.
2. The
overhead
branches
and
leaves
of
vegeta:on.
3. Tree
crown
greater
than
50
feet
in
height
at
maturity.
Understory-­‐
1. All
forest
vegeta:on
growing
under
an
overstory.
2. Tree
crown
greater
than
20
feet
but
less
than
50
feet
in
height
at
maturity.
Overrstory-­‐
1. The
por:on
of
the
trees
,
in
a
forest
of
more
than
one
story,
forming
the
upper
or
uppermost
canopy
layer

2.
dioecious-­‐
male
and
female
flower
on
separate
trees
monoecious-­‐
male
and
female
flowers
on
same
tree

3. Cercis
canadensis
(Eastern
Redbud)

4. Cercis
canadensis
(Eastern
Redbud)

5. Cercis
canadensis
(Eastern
Redbud)

6. Cornus
florida
(Flowering
Dogwood)

7. Cornus
florida
(Flowering
Dogwood)

8. Cornus
florida
(Flowering
Dogwood)

9. Gymnocladus
dioicus
(Kentucky
Coffeetree)

10. Gymnocladus
dioicus
(Kentucky
Coffeetree)

11. Lirodendron
tulipifera
(Tuliptree/
Tulip
Poplar)

12. Lirodendron
tulipifera
(Tuliptree/
Tulip
Poplar)

13. Platanus
occidentalis
(American
Sycamore)

14. Platanus
occidentalis
(American
Sycamore)

15. How
to
tell
the
difference?
Single
fruit
=
Platanus
occidentalis
(American
Sycamore)
2
or
3
fruits
on
one
stem
=
Platanus
x.
acerifolia
(London
Plantree)

16. How
to
tell
the
difference?
White
inner
bark=
Platanus
occidentalis
(American
Sycamore)
Greenish
inner
bark=
Platanus
x.
acerifolia
(London
Plantree)

17. Platanus
x
acerifolia
(London
Planetree)
!

18. Quercus
biocolor
(Swamp
White
Oak)

19. Quercus
biocolor
(Swamp
White
Oak)

20. Quercus
palustris
(Pin
Oak)

21. Quercus
palustris
(Pin
Oak)

22. Sassafras
albidum
(Sassafras)

23. Sassafras
albidum
(Sassafras)

24. Sassafras
albidum
(Sassafras)

25. Ulmus
americana
(American
Elm)

26. Ulmus
americana
(American
Elm)

27. Ulmus
americana
(American
Elm),
cul:var

28. Ulmus
americana
(American
Elm),
cul:var

29. Parthenocissus
quinquefolia
(Virginia
Creeper)

30. Ailanthus
al?ssima
(Tree
of
Heaven)