A contribution to the basidiocarp morphology of Coprinus comatus

The shape of the pileus of Coprinus comatus (Müll. ex. Fr.) S.F. Gray changes during development from ovulate to bellshaped. The hyphae bear clamp connections, have dolipores in the septa and are of two kinds: wide, inflated and narrower, thread-like hyphae. The gills have three layers: trama, sub-hymenium and hymenium. The hymenial layer is densely packed with basidia representing two generations, and cystidia intermingled with the basidia. Vesicles and glycogen granules are found in the basidia. The basidiospore is ellipsoidal and has a thick multilayered wall.