Todd Hurt Training Coordinator UGA Center for Urban Agriculture.
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Transcript of Todd Hurt Training Coordinator UGA Center for Urban Agriculture.
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Todd HurtTraining Coordinator
UGA Center for Urban Agriculture
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Identifying Landscape Plants
Scientific Names Ultimately based on fruit and flower characteristics
However, we may identify plants by:Leaf form, arrangement, odor, petiole,
margin, veination, texture etc.Bark color, texture, etc.Bud size, shape, number, etc.Whole plant characteristics form,
branching habit, and location
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What Questions do I ask?Evergreen or DeciduousLeaf Arrangement – Alternate, opposite,
otherLeaf Margin – Entire or lobedLeaf Margin – spines, toothed, smoothPlant form, spreading, bush, tree, rounded,
columnar, etc.
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Plant Identification Bud - A compressed,
undeveloped shoot. Buds may be axilary or terminal.
Node - point on the stem where leaf or bud is borne. The space between two nodes is an internode
Lenticel - a "breathing pore" in the skin or bark of a stem.
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Plant IdentificationLeaf Anatomy
Petiole - the stalk of a leaf. A leaf without a petiole is sessile
Blade - the flat, expanded portion of the leaf
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Plant IdentificationOther Leaf Terms
Stipule - flat, often leaf-like flap below a leaf. Not all leaves have stipules. Stipules can be highly modified into tendrils, spines, scales, etc.
Axillary bud – is found at the node between the leaf and stem.
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Plant Morphology - Plant Identification
Simple leafSimple - the blade is
all in one piece, though it may be lobed, toothed, etc.
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Plant Morphology - Plant Identification
Compound leavesCompound - the
blade is divided all the way to the midrib (rachis) into two or more pieces.
http://www.flickr.com/photos/zenmama/3970934706/
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Plant Morphology - Plant Identification
Compound leavesOnce pinnately
compound - leaflets arranged along one undivided main axis. (odd or even number of leaflets)
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Plant Morphology - Plant Identification
Compound leavesTwice pinnately compound -
main axis (rachis) with two or more branches and the leaflets arranged along the branches. The branch divisions are primary leaflets and the ultimate divisions are secondary leaflets. There can also be thrice-pinnately compound leaves,etc.
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Plant Morphology - Plant Identification
Compound leavesPalmately compound -
leaflets all arising from one point at the base of the leaf.
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Plant IdentificationLeaf Arrangement
AlternateOppositeWhorledFascicled
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Plant Identification
Leaf arrangementAlternate - leaves
arranged one per node
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Plant Identification
Leaf arrangementOpposite - leaves arranged two per node
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Plant Identification
Leaf arrangementWhorled - arranged two or more per node
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Plant IdentificationLeaf arrangement
Fascicled - leaves grouped in small, tight bundles
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Plant IdentificationLeaf Characteristics
Venation Pinnate Palmate Dichotomous Parallel
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Plant IdentificationLeaf veination
Pinnate - with a main midvein and secondary veins arising from it at intervals
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Plant IdentificationLeaf veination
Palmate - with the main veins all arising from one point at the base of the leaf.
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Plant IdentificationLeaf venation
Dichotomous – basal veins extend for a distance then branch forming a Y.
http://flickr.com/photos/40761667@N00/490673444
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Plant IdentificationLeaf veination
Parallel - with all the main veins parallel (usually also parallel to the sides of the leaf.)
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Plant IdentificationLeaf Characteristics
Leaf ShapeLeaf MarginsLeaf Lobes
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Plant IdentificationLeaf shapes
Ovate - egg-shaped with the larger end at the bottom.
Elliptic - shaped like an ellipse, tapered at both ends and with curved sides.
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Plant IdentificationLeaf shapes
Oblong - tapered to both ends, but with the sides more or less parallel.
Lanceolate - shaped like the tip of a lance
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Plant IdentificationLeaf shapes
Linear - very long and thin, with the sides parallel
Cordate - heart-shaped with the wide part at the bottom
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Plant IdentificationLeaf margins
Entire - smooth, with no teeth or lobes
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Plant IdentificationLeaf margins
Serrate - with sharp, forward-pointing teeth
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Plant IdentificationLeaf margins
Doubly serrate - with teeth which have smaller teeth on them
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Plant IdentificationLeaf margins
Crenate - with low, rounded scallop-like teeth
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Plant IdentificationLeaf margins
Lobed, parted, divided, cut, etc. - A number of terms describe the various degrees of lobing.
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Needled Evergreens
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Plant Form
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Scale or Awl- Like Foliage
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Form
Leaf shape and Margin Leaf
Arrangement
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Plant IdentificationLeaf lobing
Pinnately lobed - with the lobes arising along the length of the mid-line of the leaf.
Palmately lobed - with the lobes all arising from one point at the base of the leaf.
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AcknowlegementsModified from an original work David Berle,
Assistant Professor, UGA Horticulture.