Material. Stock plants of the begonia, bryophyllum calyci-num, and gloxinia, and rooted leaf cuttings of each.

Many plants having thick, fleshy leaves can easily be propagated by leaf cuttings. In some plants the entire leaf is used; in others the leaf is cut half in two and placed in the ground on its edge. In some begonias the leaf is cut into several fan-shaped sections, each cutting having a portion of the petiole attached.

Study the begonia, bryophyllum, and gloxinia. Each plant represents a different form of leaf cutting.

1. Begonia. Draw a leaf of one of the large, thick-leaved types. Indicate by dotted lines where the cuts should be made to produce the fan-shaped cuttings. Draw a single cutting. How is it planted? Where does the young plant start? Discuss.

2. Bryophyllum. Draw a leaf natural size, and note the growing points. Describe. This plant is usually propagated by laying the leaf flat on the surface of the ground, where several small plants will start. Study a leaf from which the young plants have started. Where is the origin of each plant?

3. Gloxinia. Draw and describe a rooted leaf cutting.

Fig. 7. Leaf of the bryophyllum, showing the starting of the young plants.