Definition
A sclerotium (pl. sclerotia) is a vegetative resting body of a fungus, composed of a compact mass of hyphae with or without host tissue, usually with a darkened rind.
Black-colored sclerotia of the plant pathogenic fungus, Rhizoctonia solani, on the epidermis of a potato (Solanum tuberosum) seed tuber. |
 Fungal mycelium and small, brown, round sclerotia form near the soil surface of a diseased noni (Morinda citrifolia) plant with root knot disease and southern blight. |