A piece of lamella examined with a microscope will usually bear large numbers of spores, but these may range from small, really immature ones to others that are quite mature and ready to be shot away. Had it been some colour other than brown we would not have classified it in CortinariusĪ second reason for obtaining a spore print is to be assured of a collection of mature spores for microscopic examination. armillatus shown here is clearly a light brown colour. In common with other species of Cortinarius the spore print of C. The page on mushroom classification briefly discusses how that works. First, and perhaps most important of all, is that for more than two centuries mushrooms have been classified according to the colour of their spores. There are several reasons why you might want to make a spore print. Usually white paper is used for spore prints, but white spore prints may be difficult to see and some people have chosen to make spore prints of a mushroom on both black and white paper. It is a photograph-like impression of the pileus and lamellae. The spores produced on the lamellae had been discharged during the night and had formed a thick deposit on the paper, a result called a spore print. The same pileus that had been removed from its stipe was place lamella-side down on a sheet of white paper, covered with a bowl and left overnight. At far left is a scan of the same pileus inverted to show the lamellae.
The leftmost mushroom in the picture had its stipe removed and placed beside the pileus. These were "photographed" on a flatbed scanner not long after they were collected. The picture above is of four fruiting bodies of Cortinarius armillatus, a mushroom commonly collected under birch.
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