Fungi are eukaryotic organisms that include microorganisms such as yeasts moulds and mushrooms these organisms are classified under kingdom fungi the organisms found in kingdom fungi contain a cell wall and are omnipresent they are classified as heterotrophs among the living organisms kingdom fungi. The kingdom of fungi provides an intimate look at the worlds astonishing variety of fungi species from cup fungi and lichens to truffles and tooth fungi clubs and corals and jelly fungi and puffballs this beautifully illustrated book features more than 800 stunning color photographs as well as a concise text that describes the biology and ecology of fungi fungal morphology where fungi . Characteristics of fungi now we will look at the various characteristics of the fungi kingdom thallus organisation the plant body of true fungi is a thallus it may be non mycelial or mycelial the non mycelial forms are unicellular however they may form a pseudomycelium by budding in mycelial forms the plant body is made up of thread like structures called hyphaesing hypha. The largest group of fungi is called the ascomycota the main defining character for the ascomycota is their production of sexual spores in cells called asci the asci are normally found in a tissue called the hymenium here the asci sit parallel to each other often intermixed with sterile hyphae called paraphyses