Leaves Flashcards
Chlorenchyma, flat thin leaf
Photosynthesis
Transpiration
-Continues uptake of water
-Cooling effect
-Continues degree of saturation of cell with water
Use of leaves
-Insecticides ( Rotenone, citronella)
-Waxes ( Carnauba [gummies] )
-Aromatic oils
-Medical uses ( Aloe )
Economic use
- Food ( Green leaf are the most nutritious )
- Herb ( Mint family is a popular herb )
- Beverages ( tea )
- Drugs ( Tobacco, Marijuana, Cocaine )
With petiole
Petiole
Without petiole
sessile
Blade divided
Compound
flat, light harvesting portion
Lamina/ leaf blade
sheath and ligules
Monocot leaf
stipules
Dicot leaf
holds blade out into the light
Petiole/ stalk
Sugar produced and carry them to the stem
Veins
Edge of the leaf
Margin
Outer end of leaf lamina
Apex
Leaf classification
-Nature of the leaf
-Phyllotaxy
-Leaf margin
-Leaf apex
One blade only
Simple
Leaflets attach individual to rachis by petiolule
Pinnately compound
Leaflets attach to same pt
Palmately compound
Connect to rachis
Petiolule
two leaflets
Bifoliate
three leaflets
Trifoliate
four leaflets
Quadri/ tetrafoliate
5 leaflets
pentafoliate
One leaf per node
Alternate
Two leaves opposite at one node
Opposite
Three or more leaves around a node
Whorled
