Conifers
Pitch pines have ___ needles per fascicle, while white pines have ___.
3, 5
____ trees have acorns, while ____ trees have keys.
Oaks, maples
What family contains the honey and black locust?
Fabacaeae
What’s the difference between pinnately and palmately compound leaves?
Feather-like versus palm/fan-like leaflets
What is it called when branches all come out of a single plane on the trunk?
Whorls
Which trees have modified cones?
Eastern redcedar, common juniper
What are the reproductive parts of birch trees called?
Catkins
Give the scientific name for a red oak and a red maple.
Quercus rubra, Acer rubrum
Name two trees that sometimes have doubly compound leaves.
Dawn redwood and honey locust
Which two trees have been unchanged for millions of years?
Dawn redwood and ginkgo
What kind of trees have '360 needles' on a branch and feel prickly?
Spruce
Provide an example of a tree that can have doubly toothed leaves.
American elm, river birch
What is the scientific name and family name for the ginkgo tree?
Ginkgo biloba, Ginkgoaceae
Name two characteristics of the Juglandaceae family and the two tree species we’ve learned from it.
Characteristics: Nuts as fruits, alternate pinnately compound leaves
Tree species: Shagbark and pignut hickory
What is it called when the bark ridges split apart and weave together in a semi-regular pattern (i.e. criss-cross bark)?
Anastomosing
Name a deciduous conifer.
Dawn redwood
Name each oak, which oak group they belong to, and their acorn cap types.
White oak: White oak group, Russian fur cap
Black oak: Red oak group, ski cap
Red oak: Red oak group, beret
Swamp white oak: White oak group, medusa cap
Pin oak: Red oak group, yarmulke
Give the family name for birches and give three distinct family characteristics.
Betulacaea - simple alternate leaves, catkins as reproductive organs, lenticels often present on bark
Describe the difference between honey locust and black locust leaves.
Black locust: Larger, rounder, egg-shaped leaflets and fewer leaflets per leaf
Honey locust: Thin, oval-shaped leaflets with far more leaflets per leaf
Name the family and two other plants in the same family as Toxicodendron radicans.
Anacardiaceae — mango, cashew, sumac
Name three differences between the northern white cedar and eastern red cedar.
- Flat needles vs. 3D sprays
- Small brown cones vs. berry-like modified cones
- Oil glands in needles vs. no scent
Name a distinctive feature of each of the following trees: Black cherry, American elm, flowering dogwood
Possible answers:
Black cherry - orange mustache along leaf rib, extrafloral nectaries, cyanide smell
American elm - rough texture, asymmetrical base, parallel veins
Flowering dogwood - elastic veins, teardrop-shaped veins running parallel to leaf edge
Give the scientific name for the virginia creeper. Bonus 200 points if you can spell it correctly.
Parthenocissus quinquefolia
Fabaceae trees typically have WHAT kind of leaves. Which of our Fabaceae trees is an exception to this rule?
Fabaceae trees typically have compound leaves, but Eastern redbuds have simple leaves.
What is the purpose of extrafloral nectaries and which tree(s) did we see them on?
Black or sweet cherry - used to attract predators to help defend the tree