Thallophytes are a polyphyletic group of non-mobile organisms that are grouped together on the basis of similarity of characteristics, but do not share a common ancestor. They were formerly categorized as a sub-kingdom of kingdom Plantae. These include lichens, algae, fungus, bacteria and slime moulds and bryophytes.

Characteristics of Thallophyta

• They are usually found in moist or wet places. 
• This is due to the absence of “true roots” and vascular tissue that is needed to transport water and minerals. Hence they are found in moist or wet places. 
• They are autotrophic in nature. 
• Most members in this group manufacture their own food. But a few members like fungi are dependent on other sources of food., 
• Reserve food is generally starch. 
• After photosynthesis, glucose is produced and consumed almost immediately, the remaining glucose is converted into complex compounds called starch. 
• They have a cell wall composed of cellulose around their cells. 
• Absence of vascular tissue. 
• Unlike other plants, xylem and phloem are absent. etc 
• Sex organs are simple, single-celled, there is no embryo formation after fertilization.