In this essay we will discuss about:- 1. Roots of Glossopteris 2. Leaves of Glossopteris 3. Fructification. Essay # 1. Roots of Glossopteris: The detached roots of Glossopteris plant are called Vertebraria (Fig. 1.9B). The roots are flattened and grooved with wedge-like sectors that radiate from the centre of the axis. The wedges are made up of secondary xylem which [...]
In this essay we will discuss about:- 1. Stems of Lyginopteris Oldhamia 2. Fronds of Lyginopteris Oldhamia 3. Roots 4. Pollen-Bearing Organs 5. Seeds. Essay # 1. Stems of Lyginopteris Oldhamia: The frequently branched stem of Lyginopteris oldhamia was long, slender (2 mm to 4 cm in diameter). The anatomy of the stem (Fig. 1.2A) shows eustelic configuration with [...]
In this essay we will discuss about the life cycle of Pinus, explained with the help of suitable diagrams. Sporophyte of Pinus: Pinus is a tall evergreen tree giving rise to a series of widespread horizontal branches (Fig. 1.57A). In each year, a whorl of branches is produced in the axil of scale leaves. The branching is restricted to the [...]