FOR200H1 Lecture Notes - Lecture 3: Sapindaceae, Thuja, Spruce

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15 Aug 2016
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FOR200 Week 2
Introduction to Tree Identification
Taxonomic Nomenclature (how we name tree species)
Ex: Sugar Maple – Latin: Acer saccharum (Sapindaceae)
- Sugar Maple  common name
- Acer  Genus name *know for tests!
- Saccharum  Species epithet (species you are looking at) changes when you identify with
different species.
- Sapindaceae  Family
Gymnosperms, Softwoods, Evergreens, Conifers
- All have needle-like leaves
Important Conifers
Pines - Pinus species
oWhite Pine - Pinus strobus
oRed Pine - Pinus resinosa
Spruces - Picea species
oNeedle like leaf joins with branch but only one needle, for every point that connects
to the branch there is only one needle. Have needles that wraps around the branch
oColorado Blue Spruce – Picea pungens
oWhite Spruce – Picea glauca
Cedars - Thuja Species
North White Cedar – Thuja occidentalis
Larches – Larix species
Tamarack - Larix Iaricina
Hemlock – Tsuga species
Yew – Taxus species
Angiosperms/Hardwoods/Deciduous
- More diverse
Broadleaf Trees: Simple Leaf vs. Compound Leaf Species
- Simple Leaf: for any single leaf stock that connects to the branch, there is only one leaf
blade that is connected to the leaf stock
- Compound Leaf: multiple leaflets that are held up by an individual leaf stock
Leaf Patterns: Alternate vs. Opposite
- Alternate: one side of branch to the next
- Opposite: on any given location, there will be two leafs coming out directly on either side
Important Hardwoods
Maples – Acer species
- Norway Maple, Red Maple, Sugar Maple
Ashes - Fraxinus species
- Compound and opposite
- Green ash
Oaks – Quercus species Walnut – Juglans Species Horse-Chestnut – Aesculus species
Birches - Betula species Elms – Ulmus Species Beech – Fagus species
Honey Locust – Gleditsia species
Refer to handout!!!
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