Common Names: Gemmed Amanita, jonquil Amanita
Amanita gemmata is a mycorrhizal fungus. The fruit bodies are colored yellow overall. The fresh cap, ranging in color from dull creamy yellow to golden yellow to buff, is sticky when moist. White warts adorn the cap surface, but they are usually flimsy and easily washed away by rain. They are placed randomly, but tend to be more concentrated in the center. The cap is typically 2.5 to 12 cm in diameter, and initially convex before flattening out in maturity. The flesh is white, and shows no change when sliced. The gills are adnate to adnexed, and white; they are close together, with little intervening space. The pale yellowish stem is 4 to 12 cm long by 0.5 to 1.9 cm thick, and either roughly equal in width throughout, or slightly thicker at the base. Young mushrooms have a membranous partial veil extending from the upper stem to the cap margin; as the mushroom grows, the partial veil tears to leave a flimsy, skirt-like, easily lost ring on the stem. At the base of the stem is a white volva (a remnant of the universal veil that covered the immature mushroom) that usually forms a small, free rim. Spore prints are white.