Calcipostia guttulata: The Ultimate Mushroom Guide

About The Calcipostia guttulata Mushroom

Calcipostia guttulata is a rare species. It is a small to medium annual polypore. Cap fan-shaped, flattish at maturity, white, smooth but with scattered tiny, circular depressions; bruising rusty-brown; pale brown overall in age. Pores cream-colored (and said to occasionally show a pale green tint). Stalk slender and much longer than the cap is wide, colored like the cap, smooth. Saprophytic as well as parasitic.

It has a soft, white fruitbody, often with shallow circular depressions on the surface of the cap. Circular depressions may be filled with liquid when fresh. Pores are very small, circular to angular. Bitter taste. Brown cubical rot on conifers, or brown butt rot on Picea.

Habitat solitary or in small clusters on rotting conifer wood; also fruiting at the base of infected live Sitka spruce.