Amanita cokeri
Amanita cokeri, commonly known as Coker's amanita and solitary lepidella, is a poisonous mushroom in the family Amanitaceae. First described as Lepidella cokeri in 1928, it was transferred to the genus Amanita in 1940.
Taxonomy
Amanita cokeri was first described as Lepidella cokeri by mycologists E.-J.Gilbert and Robert Kühner in 1928. It was in 1940 when the species was transferred from genus Lepidella to Amanita by Gilbert. Presently, A. cokeri is placed under genus Amanita and section Roanokenses. The epithet cokeri is in honour of American mycologist and botanist William Chambers Coker.Description
Its cap is white in colour, and across. It is oval to convex in shape. The surface is dry but sticky when wet. The cap surface is characterized by large pointed warts, white to brown in colour.Gills are closely spaced and free from the stem. They are cream at first, but can turn white as the mushroom matures. Short-gills are frequent. Stem is white, measuring long and thick. It tapers slightly to the top, smooth to shaggy in texture. There is a ring, thick and often double-edged, the underside being tissuelike. The universal veil hangs from the top of the stipe. The basal bulb is considerably large in size, with concentric circles of down-turned scales. The volval remnants stick to it and cause irregular patches.
Spores are white, elliptical and amyloid. They measure 11–14 x 6–9 μm, and feel smooth. Flesh is white, and shows no change when exposed. There is no distinctive odour, but some specimens may develop the smell of decaying protein.