Field Mushroom Agaricus campestris L. (illustrated 70% life size) Cap 3–10cm across, domed and remaining so a long time before expanding fully; white, sometimes creamy yellow; scaly or smooth. Stem 30–100×10–20mm, with a tapered base; white, sometimes yellowing slightly towards the base; ring thin and white, short-lived, often little more than a torn frill. Flesh white, bruising faintly pink, especially above the gills; taste and smell pleasant and mushroomy. Gills free; deep pink even in unopened ‘buttons’, finally darkening to brown. Spores 7–8×4–5¼, ovate. Spore print brown. Cheilocystidia absent. Habitat in pasture; late summer to autumn. Very common. Edible excellent.