Common Mushroom Small 293×320 Medium 585×640 Large 936×1024 Download Tiff Original 2194×2400 | (700.6 KB) Description "Agaricus- A large and important genus of fungi, characterized by having a fleshy cap or pileus, and a number of radiating plates or gills on which are produced the naked spores."-Whitney, 1902 Keywords cap, gills., mushroom, pileus, spores Galleries Mushrooms Source: William Dwight Whitney, The Century Dictionary, an Encyclopedic Lexicon of the English Language (New York: The Century Co., 1902)I-107