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Classifying Leaves and their categories...

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by

Natasha Riddell

on 12 December 2014

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Transcript of Classifying Leaves and their categories...

Classifying Leaves and their categories...
Leaf Types
Leaf Shapes
Leaf arrangements
Linear, Oblong and Oval
Oval, Ovate, Cordate and Deltoid
Orbicular, 4 sided needle and flattened needle
Opposite
Alternate
The alternate leaf arrangement is when the leaves on a stalk or branch go one after another up the stalk and alternate, hence the name "alternate" leaf arrangement.
Whorled
The whorled leaf arrangement is when the leaves all stem off at a certain area making a clumped or spread out circle arrangement. They look whirled, which is similar to their name, whorled.
Simple Leafs
This is a simple leaf. It has one midrib, blade and stalk (missing stipule, but most leaves don't have one). To classify a simple leaf, just make sure it has one of everything listed above.
A leaf and its parts
A leaf has 4 parts to it. When all the components come together, they make one big thing, kind of like a prezi! The parts are listed below...
The Stipule
Often absent, they resemble two little leaves facing opposite to each on the leaf stalk right before the main leaf.
Stalk (petiole)
Connects the blade of the leaf to the branch it comes off of.
Blade
The majority of the leaf. It has veins running through it and has pigments that aid in the process of photosynthesis.
Midrib
The main line running through the leaf blade. Connects with the petiole.
Welcome to my prezi! For this prezi to fully inform you, you must check out the chart in the next slide. It will explain the parts of a leaf so when you learn about leaf types, you are aware of the differences. Happy hopping!
Okay! A reading you shall go!
Okay, I think it is about time to really start this prezi! Now that you are knowledgeable, this prezi will be a breeze!
Compound leaf
It has:
more than one stalk
more than one blade.
The way I like to remember the differences in simple and compound leaves is by saying:
Simple leaves only have one stalk.....
but compound leaves have at least, a stalk on a stalk. This makes sense because if you look at the stalk on this leaf, it has stalks branching off of it with leaves. Look at highlighted part if confused.
Yellow highlighter shows the stalks.
Double Compound leaf
A double compound leaf has a main stalk, stalk that come off of that, and stalks that come off of that that connect the leaves to the whole thing. It is really difficult to thoroughly explain, so look at the highlighted sections. It helps if you scroll around and zoom in when looking at the highlighted areas.
= main stalk
= stalk(2) branching off of main stalk
= stalk(3) branching off of stalk(2)
Then Finally The Needle Leaf!
First of all, this is in this circle because the tree the others are on doesn't accompany this leaf. This leaf does not have a midrib, "blade", stalk or stipule! The needle leaf doesn't really have a main vein, a blade or a stalk because the needle itself acts like each one! There isn't such thing as a needle midrib, so it can't have that either!
Needle leaf
Leaf shapes are basically self explanatory. They are the shape of a leaf. There are ten general shapes that cover the shape of almost any leaf! They are; linear, oblong, oval, ovate, cordate, lobed, deltoid, orbicular, 4 sided needle and a flattened needle!
What is
it's shape?
I don't know!

Leaf shapes Introduction
Lobed
Lobed: Its outline forms various sizes of humps. Appears to be long, but size can vary. Doesn't really resemble another shape because its shape is quite unique.
Linear
Linear: Very long and skinny. Has a partially pointed tip. Sometimes tip is rounded. Resembles the leaf shape oblong.
Oblong
Oblong: Long and a little bit wide. Resembles the leaf shape linear. Difference is that oblong is wider and doesn't have much of a tip.
Deltoid
Deltoid: It is shaped like a triangle because of the way the blade near the petiole stays horizontal. Has a pointed tip and near petiole, is very wide. Resembles the leaf Cordate, but Deltoid has a completely horizontal blade near the petiole.
Oval
Oval: Looks like an oval, can be very tall and is slightly wide with a rounded tip. Resembles Ovate, but they aren't the same.
Ovate
Ovate: Looks somewhat like an oval, becomes wider near the petiole and can be fairly large. Resembles the leaf shape Oval, but the vital difference is that the Ovate leaf has a pointed tip and the Oval has a round one.
Show off...

Cordate
Cordate: It is shaped like an upside-down heart because of the way the leaf near the petiole curls inwards. Has a pointed tip and can be very wide. Resembles the leaf shape Deltoid.
Orbicular
Orbicular: It looks very much like a circle because there are not any of the curves you see on many other leave shapes like cordate. Does not have a tip and can be very wide. Does not really resemble another leaf shape.
4 sided needle
4 sided needle: Has 4 sides to it as shown in the picture.
Flattened needle
It looks like an ovate leaf, but I'm only 6, how would I know?
Pictures
Cool leaf shapes
Leaf Arrangements
The opposite leaf arrangement is when leaves on a stalk or branch line up with each other and they are "opposite" of each other. Hence the name "opposite" leaf arrangement .
Basal
The basal leaf arrangement is when most or all of the plant's leaves are at the very bottom of the stalk. They can be layered numerous times, or be well spread out with only one layer.
Leaf arrangements are the arrangements of the leaf on the stalk or the branch. There are really only four categories that sum up leaf arrangements. They are opposite, alternate, whorled and basal.
Then of course there are needle arrangements and types...
The last leaf arrangements are the needle arrangements. There are 5 needle arrangements in total that sum up the arrangements of needles.
In Bundles of 2
The needles come in bundles of two...
In bundles of 5
The needles come in bundles of five.
Singly on twig
The needles don't come in bundles. Instead they are singly on twig.
In clusters of more than 5
The needles come in clusters of more than five.
Scale-like(type)
The needles are not like the normal ones we see, in the way that they are not just smooth pole-like needles. They resemble scales because they form little plantation matter that makes them look like scales.
Branching Patterns
Branching patterns
There are many different trees out in the world, realistic and cartoon as shown around this circle. Every tree has a branching pattern (pattern of branches) unless it is a stump which doesn't have the room or energy/life to create/have a branch. There are several.
The types of branching patterns.
Whorled
The branches are attached in a variety of different amounts from the same location on the trunk.
Opposite
The branches grow from the opposite sides of the trunk, across from each other.
Alternate
Branches grow opposite each other, but one will be farther up the trunk than the first.
Spiral
Branches grow alternately along the trunk, but in a spiral pattern like a corkscrew, moving up the trunk.
Excurrent
The Seven Types Of Branching Patterns
Needles that are almost always on any pine tree you may see.
The main trunk goes the entire height of the tree with the branches forming patterns. An example would be and Evergreen.
Pattern in pic is 5 alternate, 1 opposite.
Decurrent
The main trunk continues up halfway, then splits into more than one main branch. An example would be a fruit tree.
Columnar
The main trunk continues the full height of the tree, with branches forming only at the top. An example would be a palm tree (not like you'll be seeing one anytime soon in Edmonton...)
Thank You for seeing this!
Thank you for seeing and reading my prezi! I really appreciate it! Hope you enjoyed, and may the power of leaves and trees be with you!
Full transcript