Most fungi that rot wood in standing trees are basidiomycetes, the group that includes mushrooms and fleshy shelves. Most wood-rot fungi attack only one or two related species of trees, with conifers and deciduous trees more prone to fungi damage. In addition, many wood-rot fungi damage only specific parts of a tree. For example, Ganoderma lucidum and Heterobasidion annosum specifically rot roots and are rarely found in the higher portion of trees, whereas Cerenna unicolor and Climacodon septentrionale are more common in high sections of trees and are rarely found in the roots. Laetiporus sulfurous and Fomitopsis pinicola are found in all sections of a tree except in the smallest branches.