Mushroom basidiospores. Coloured scanning electron micrograph (SEM) of basidiospores of the Field Mushroom (Agaricus campestris). The basidiospores are the pale, egg-shaped objects borne on stalks, and produced by reproductive cells beneath called basidia. They occur on the mushroom gills and each spore can develop into a new fungal growth. Magnification: x3, 900 at 5x7cm size. x13,375 at 10x8"~LANDSCAPE"