 Viewed with a microscope, the spores are broadly elliptical or roughly spherical, smooth, thin-walled, and have dimensions of 6.5–9.5 by 5.5 by 8.5 µm.Spores are amyloid (meaning they take up iodine when stained with Melzer's reagent) The basidia (spore-bearing cells on the edges of gills) are four-spored and measure 30–50 by 4–11 µm.The bases of the basidia have clamp connections—short branches connecting one cell to the previous cell to allow passage of the products of nuclear division.