Assign a random array string to a text component - Unity 4.6, uGUI

I'm creating an array with a list of descriptions (strings) that I need to choose randomly and then assign to a text component in a gamobject. How do I do that? I've created the array but I don't know where to go from there. Can anyone help me with this?

public string[] animalDescriptions = 
{
    "Description 1",
    "Description 2",
    "Description 3",
    "Description 4",
    "Description 5",
};


void Start () 
{

    string myString = animalDescriptions[0];
    Debug.Log ("You just accessed the array and retrieved " + myString);

    foreach(string animalDescription in animalDescriptions)
    {
        Debug.Log(animalDescription);
    }
}