Exercises on Lesson IX.
1. Take in twigs of hawthorn, barberry, holly, bramble, and gooseberry. Examine, and sketch them so as to show their protective parts. 2. Grow a small whin bush in a pot and water it daily. Note that the new growth it makes is tender, and that no spines are produced. 3. Some plants are covered with dense woolly hairs. These are seldom eaten by cattle. Can you explain why? 4. Make a list of all the armed plants you know, and tell how each is protected.