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Tree Identification John Ross. Tree Identification ISA Certified Arborist. Study guide for the Arborist Certification exam of the International Society of Arboriculture. Presented by John Ross Burditt: Conroe, Texas jross@burditt.com. Plant Classification.

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Tree Identification John Ross


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    1. Tree Identification John Ross

    2. Tree IdentificationISA Certified Arborist Study guide for the Arborist Certification exam of the International Society of Arboriculture. Presented by John Ross Burditt: Conroe, Texas jross@burditt.com

    3. Plant Classification Plant Classification (taxonomy) Kingdom (Plant) Phylum (Vascular plants or not) Class (Angiosperms; di or monocotyledons Gymnosperms have “naked seeds”) Order Family (Similar characteristics) Genus (Closely related, Quercus) Species (THE individual plant)

    4. Plant Nomenclature Plant Nomenclature (naming of plants) Common names vs. Latin names Genus and species…. Quercusstellata Varieties & cultivars… var. & ‘Little gem’ Plant Morphology (appearance of tree parts) Branching structure (alternate, opposite, whorled) Leaf type (simple or compound) Leaf margins, apices & bases

    5. Plant Morphology continued Bud type and arrangement Twig & pith characteristics Seed types (acorn, samara, legume, etc.) Bark characteristics (ex. hackberry “warts”) Form & habitat Flowers (ex. flowering dogwood)

    6. Leaf Arrangement & “Parts”

    7. Compound Leaf Types

    8. Leaf Bases & Apices

    9. Leaf Margins & Other Types

    10. Buds & Twigs

    11. Loblolly Pine Pinus taeda Form: Open Spreading Crown Grayish Coloring To Cone 3 (Occasionally 2) needles

    12. Slash Pine Pinus elliottii Form: Round Top Head Carmel Coloring To Cone 2 and 3 needles

    13. White ash Fraxinusamericana Single Samara Opposite, pinnately compound U Shaped Leaf Scar

    14. Green ashFraxinuspennsylvania Opposite, pinnately compound Single Samara U Shaped Scar Brown Tinged with Red, Slightly Furrowed or Ridged

    15. Eastern cottonwoodPopulusdeltoides Simple, Alternate, Triangular, Square Base, Coarsely Toothed Male Catkins Prominent Lenticels, Triangular Leaf Scars

    16. American elmUlmusamericana Alternate, Inconspicuous Lenticels, Elevated semicircular Leaf Scars Alternate, Simple, Double Serrate, Oblique Base Broad Flat-Topped Ridges, Deep Elliptical Fissures

    17. Common hackberryCeltisoccidentalis Alternate, Simple, Deciduous, Serrate, Asymmetrical Base Alternate, Numerous Pale Lenticels Many Corky Ridges, Gray-Brownto Silver-Gray

    18. HoneylocustGleditsiatriacanthos Seed Pods Alternate, Deciduous, Pinnate & Bipinnately compound Irregular Shield-shaped Leaf Scars, Stout Thorns Gray-brown to Black, Scaly Ridges, Deep Fissures

    19. Boxelder mapleAcernegundo Opposite, Coarsely Serrate, Pinnately compound Double Samara, Slightly Converging Wings Scattered Pale Lenticels

    20. MulberryMorus spp. Cluster, Dark-red to Purplish Gray-brown, Scattered Gray Lenticels Catkins Alternate, Simple,Deciduous, Toothed & Lobed

    21. Bur oakQuercusmacrocarpa Acorn, Usually Solitary, Deep Bowl-shaped Cup, With conspicuous Fringe, Enclosing up to ¾ of the Nut Alternate, Simple, Deciduous, 5 to 9 Lobed, Coarsely Toothed Terminal Lobe Half Round Leaf Scars Hairy Stalked Catkins

    22. Eastern redbudCerciscanadensis Alternate, Simple, Deciduous, Kidney Shaped, Heart Shaped or Flattened Base Calyx Tube, Flower Pod 2” – 3 ½”

    23. Eastern redcedarJuniperusvirginiana Awl-shaped, Sharp-pointed, Spreading and Whitened Scale-like in 4 ranks Giving Square appearance Thin Reddish-brown Bark, Peels Off in Long Shred-like Strips

    24. SycamorePlatanusoccidentalis Alternate, Simple, Deciduous, Wavy With Short or Long Tapering Teeth, Flat or Heart Shaped Base Persistent Multiple Of Achenes Forming A Head 1” in Diameter Bark Mottled By Large Plate-like Scales

    25. Black walnutJuglansnigra Born Singly Or In Pairs, Nut Has Hard Thick Shell Many Raised Orange Lenticels, Large Shield Shaped Leaf Scars Alternate, Compound, Extremely Tapering At End, Toothed Along Margin

    26. PecanCaryaillinoensis Alternate, Compound, Tapering At End, Toothed Along Margin Conspicuous Orange-brown Lenticels, Obovate Leaf Scars Ellipsoidal Nut,Thin Skinned Husk, 4-Winged From Base to Apex

    27. Osage-orangeMaclurapomifera Alternate, Simple, Oval-pointed Short Axillary Thorns, Triangular To Kidney Shaped Leaf Scars Compact Cluster Of Green Oblong Firm Drupelets, Appearance Of A Green Orange Broad Rounded Interlacing Ridges

    28. Post oakQuercusstellata Acorn, Occasionally In Pairs, Bowl Shaped Cup Enclosing 1/3 Of Nut Half Round Bundle Leaf Scars, Pale Lenticels Alternate, Deciduous, Usually Unequally 5-lobed

    29. Live oak Quercusvirginiana (or fusiformis) 40-50 Feet High, Branching Close To Ground Into A Few Massive Wide Spreading Limbs, RoundTopped Crown Alternate, Simple, Evergreen, Entire Margin Acorn, In Clusters of 3 to 5, Top Shaped Cup Enclosing 1/3 of Nut

    30. Black willowSalixnigra 30-40 Feet High, Clustered Stems Forming Broad Irregular Open Crown Alternate, Simple, Deciduous, Lanceolate Shaped Dark Brown to Black, Deeply Divided, Shaggy Scales on Old Trunks

    31. Bur Oak Test Tree #1

    32. Common Hackberry Test Tree #2

    33. Green Ash Test Tree #3

    34. Mulberry Test Tree #4

    35. Eastern Cottonwood Test Tree #5

    36. American Elm Test Tree #6

    37. Eastern Redcedar Test Tree #7

    38. Sycamore Test Tree #8

    39. Eastern Redbud Test Tree #9

    40. Loblolly Pine Test Tree #10

    41. Thank you John Ross