The spore print habit, and what it ruled out this week
September 26, 2026 · 3 min read
A spore print is the one check I never skip, even for something I think I know. I cut the stem flush with the cap, lay the cap gills-down across the join of a half white, half black sheet of paper, put a glass over it to stop the air moving, and leave it on the windowsill overnight. By morning there is a print of the gill pattern in whatever colour the spores happen to be, and the two paper colours make sure a white print or a dark print shows up either way. It costs nothing but patience and it has changed my mind more than once.
This week it earned its place twice. The first was a handsome white-capped mushroom from the grass under a line of oaks, with a ring on the stem and gills that were white at the edge. The print came out pure white. White spores, white gills and a ring put it in a group I do not eat under any circumstances, however confident a book makes me feel, because that group contains the ones that kill. The print did not identify it; it told me to stop, which is just as useful.
The second was a candidate for a field mushroom from the same meadow, further from the trees: pink gills turning brown, a stem that snapped cleanly, a smell I would call mushroomy and nothing else. The print was a deep chocolate brown, which is right. I rubbed the base of the stem with my thumb and waited two full minutes watching for a chrome yellow stain, which is the giveaway for the one that makes people ill, and nothing changed. All of that lined up, and I still did not cook it.
The reason is the smell. The books say the bad one smells of ink or disinfectant when the flesh is bruised, and the good one does not, and I honestly could not say with confidence what I was smelling, standing in a meadow with a cold coming on. A beginner’s nose is not a reliable instrument, and the cost of being wrong is a very bad week at best. So the print went into the notebook with the photographs and the specimen went on the compost heap.
What I keep from a week like this is not a meal but a growing set of features I have checked with my own hands. Next autumn, in the same meadow, I will know more. The mushrooms will be back; they always are.