Download - Updated summer tree id practice cyber
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Summer Tree ID Made EasySanford S. Smith, Ph.D. (“Sandy”)
Extension Specialist
Natural Resources and Youth Education
School of Forest Resources
Penn State Cooperative Extension
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Tree ID, why?
DiagnosisManagement
Right ___ Right ___ Fun
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Tree ID
Year ‘round
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What can we use?
• Sometimes– Leaves– Flowers– Fruit
• All times (almost)– Bark– Location– Shape– Size– Shape– Smell– Taste
– TWIG!!!!
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Leaf Terminology
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Leaf Terminology
blade
leafmidrib
petiole
stipule
bud
stem
Simple Leaf
rachis
leaflet
petiolule
bud
Compound Leaf
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Leaf Types
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Broad and flat
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Needles
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Scale & awl-like
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Leaf-type Comparison
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Leaf Arrangement
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Alternate
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Opposite
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Whorled
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Leaf Arrangement Comparison
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Leaf Structure
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Compound Leaflet ArrangementsPalmately Compound
EvenPinnate
Bipinnately Compound
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Leaf margins
Dentate
EntireDouble serrate
Lobed
Serrate
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Leave the Leaves!
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Fruit typesAchene
Acorn (nut)
Double and Single Samara
Nut
Legume
Capsule
Pome
Drupe
Berry
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Tree Shapes
Branches: Pendulant Ascending
Willow White Oak
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Parts of a twig
• Buds (scales, size, arrangement)
• Leaf scars (shape, size, vascular bundle scars)
• Stipule scars (presence, size)
• Lenticels (visibility)
• Pith (cross section shape & longitudinal appearance)
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Pith types
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Bud T
ypes
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Identification Time
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Tree ID with a Key to the Leaves
One decision at a time
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Identification keys
• Dichotomous key
– most common type of key– simplistic and complex use– one decision at a time– On-line example
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4-H Summer Key to PA Trees
Direct Online Link:
http://downloads.cas.psu.edu/4H/Summerkeyfortrees.pdf
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Leaf Terminology
blade
leaf
petiole
bud
stem
Simple Leaf
rachis
leaflet
petiolule
bud
Compound Leaf
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Leaf Arrangement Comparison
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Lets practice!
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Hint: opposite
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Red MapleAcer rubrum
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Red Maple
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Hint: opposite
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Sugar MapleAcer saccharum
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Sugar Maple
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Hint: alternate
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Northern Red OakQuercus rubra
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Northern Red Oak
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Hint: opposite
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Horse Chestnut Aesculus hippocastanum
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Horse Chestnut
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Eastern HemlockTsuga canadensis
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Eastern Hemlock
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Hint: lvs. alternate, sap not milky
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Black LocustRobinia pseudoacacia
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Black Locust
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Hint: opposite
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Flowering DogwoodCornus florida
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Flowering Dogwood
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Hint: alternate
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White OakQuercus alba
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White Oak
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White Oak Red Oak
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Hint: alternate
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American BeechFagus grandifolia
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American Beech
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(one bundle joined by a small papery sheath at base)
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Eastern White PinePinus strobus
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Eastern White Pine
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Clue: alternate, sap not milky
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Bitternut HickoryCarya cordiformis
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Bitternut Hickory
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Hint: opposite
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White Ash
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Hint: alternate / hairy
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Yellow Birch Betula alleghaniensis
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Yellow Birch
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Hint: alternate/hairySweet (Black) Birch ID Slide
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Sweet (Black) BirchBetula lenta
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Sweet (Black) Birch
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Eastern RedcedarJuniperus virginiana
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Eastern Redcedar
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Hint: lvs. alternate, rough, and hairy
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American ElmUlmus americana
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American Elm
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Hint: 3 lvs. shown, alternate
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SassafrasSassafras albidum
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Sassafras
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Hint: lvs. alternate
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Sweetgum Liquidambar styraciflua
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Sweetgum
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Hint: lvs. alternate, milky sap in leaf stalk
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Norway MapleAcer platanoides
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Norway Maple
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Hint: leaves do not have stalks
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Balsam FirAbies balsamea
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Balsam Fir
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Norway SprucePicea abies
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Norway Spruce
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Balsam Fir Norway SpruceFir versus Spruce
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Hint: lvs. alternate, not hairy, margins have fine teeth; leaf stalks have glands.
(Single leaf) (Branch)
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Black CherryPrunus serotina
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Black Cherry
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Hint: lvs. alternate, sap not milky, leaves hairy
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Black WalnutJuglans nigra
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Black Walnut
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American LarchLarix laricina
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American Larch
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Hint: lvs. alternate
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Yellow-poplar Liriodendron tulipifera
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Yellow-poplar
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Hint: lvs. alternate, milky sap
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Smooth SumacRhus glabra
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Smooth Sumac
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•Prepared by Paul Roth, Former Research Assistant, Rance Harmon, Former Extension Associate, and Sanford Smith , Forest Resources Extension Specialist, The Pennsylvania State University, School of Forest Resources & Cooperative Extension
Acknowledgements•Idea development and review: Jason Hall, Sandra Insalaco, and Cecile Stelter – Service Foresters – Pennsylvania Department of Conservation and Natural Resources, Bureau of Forestry
•Review: James Finley, The Pennsylvania State University School of Forest Resources & Cooperative Extension
•Images provided courtesy of Virginia Tech & The University of Wisconsin.
•Line art courtesy of The Pennsylvania State University College of Agricultural Sciences and the Pennsylvania 4-H Program
References•Common Trees of Pennsylvania, Department of Conservation & Natural Resources, Bureau of Forestry
•The Audubon Society Field Guide to North American Trees Eastern Region, Knolph, Alfred A. Inc. 1980
•Virginia Tech Dendrological Web Page, www.fw.vt.edu/dendro/dendrology/main.html
•University of Wisconsin, botanical images, www.wisc.edu/botit/dendrology/names.html
•Textbook of Dendrology. Harlow, Harrar & White. 1978. McGraw-Hill Book Company
•Manual of Woody Landscape Plants. Dirr.Penn State is committed to affirmative action, equal opportunity, and the diversity of its workforce.
© The Pennsylvania State University, 2009
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Penn State is committed to affirmative action, equal opportunity, and the diversity of its workforce