This document discusses lichens, which are symbiotic organisms consisting of fungi and algae or cyanobacteria. It covers the structure, classification, and reproduction of lichens based on where they grow such as on soil, leaves, plastic, or metal. The document also mentions that lichens can contain either blue green algae or green algae.

1. Dr. V. RAMESH
Assistant Professor & Head
Department of Botany
Vivekananda College
Tiruvedakam West – 625 234
ramesh.vnr09@gmail.com
LICHENS-STRUCTURE, CLASSIFICATION &
REPRODUCTION

8. Tericolous Folicolous Plasticolous Metalicolous

10. Blue green and Green Algae

14. Ponmurugan et al.,