Nomenclatural Citations/Agaricus/americanus

Original description (English)
Pileus convex, distinctly umbonate, squamose, with the margin obscurely striate; gills free; stem slender, smooth, annulate, stuffed or hollow, gradually enlarged below into a long, subventricose, bulb-like base; ring thin, subpersistent, fixed. Grassy ground by road sides. August. Buffalo. Height 3 in. to 5 in., breadth of pileus 11/2-3 in. The whole plant becomes of a dull pinkish red in drying.