This document provides information about a botany and pharmacognosy session covering leaves. It defines the main functions of leaves as photosynthesis and transpiration. It describes leaf structure in dicotyledons and monocotyledons. It discusses simple and compound leaves, types of compound leaves, and modified leaves. The document also covers inflorescences, bracts, and determinate and indeterminate inflorescences. The next session will cover flowers and fertilization.