Study the coralloid roots, scale leaf and megasporophyll of Cycas in detail.

1. Coralloid roots of Cycas: 

Coralloid roots of Cycas show association with blue green algae for nitrogen fixation.

Coralloid roots are coral-like, dichotomously branched and fleshy. They grow upward toward the surface of the soil. These roots arise from the lateral branches of normal roots. 

2. Scale leaf of Cycas: 

In Cycas leaves are dimorphic i.e. foliage leaves and scale leaves. Scale leaves are minute, membranous and brown. These are non- photosynthetic and provide protection to the stem apex. 

3. Megasporophyll of Cycas: 

Megasporophylls are usually arranged in compact structures called female cones or female strobili. Megasporophyll contains megasporangia (ovule) which produce megaspores.