Leaf Identification	Leaf Arrangement and Venation

Leaf Arrangement and Venation

After you have determined the shape and grouping of the plant's leaves, you need to examine the arrangement of the leaves on the stem.

Here are the three principle ways leaves are arranged on the stem:

1. Opposite - directly opposite each other on the stem
Examples

2. Alternate - on both sides, but not directly across from one another.
Examples

3. Whorled
Examples

 Leaf Venation

The lines that appear on the surface of a leaf and look like blood vessels are called Veins

The two main types are:

Palmate

Pinnate

(Yes, these are the same adjectives used to describe compound leaves.)

Practice

Now test what you've learned about leaf arrangements, venation, and margins (Go to Test Pilot)