Leaf Morphology.

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Presentation transcript:

Leaf Morphology

Similarities and differences Tell me about these… Similarities and differences

What do you know about leaves?

Types of Leaves

Parts of a Leaf Tip: terminal point of a leaf Blade: flattened green expanded portion Margin: edge of a leaf Midrib: most prominent central vein Lateral veins- secondary veins in a leaf Petiole- leaf stalk that connects blade to stem Stipules-leaf-like appendages. They can protect the young leaf and may be modified into spines or tendrils

Compound Leaves Leaflet- 20 leaf of a compound leaf Rachis- an extension of the petiole bearing leaflets Petiolule- leaflet stalk Petiole- leaf stalk Lateral veins- 20 veins in a leaf Stipules-leaf like appendages

Compound Leaves Palmately Compound (digitate)- no rachis Pinnately Compound (pinnate)- rachis

Compound Leaves

More Compound Leaves

Leaf Attachment Petiolate- blade attached by petiole Sessile- no petiole

Count to ten and breathe SHEESH! THAT’S TOUGH! Count to ten and breathe

PAIR UP, SKETCH, & LABEL! PALMATELY COMPOUND-DIGITATE PINNATE SIMPLE-PETIOLATE BIPINNATE

Are you ready for more? Let’s go!

Leaf Arrangement

Leaf Venation

Leaf Margins

Leaf Shapes Cordate- heart shaped “ob”- widest part at the base

Project due Thursday 8/22! YOU GUYS DID GREAT! Label neatly 10 characteristics could use less than 10 specimens! Start tonight with your leaves  YOU GUYS DID GREAT!