How to photograph mushrooms for identification – 3 key shots

For a photo of a mushroom to be useful for identification, a single shot of the cap from above is not enough. You need three photos: the cap from above, the underside of the cap (gills, tubes or spines) and the stem base cleared of leaf litter, because that is where the features that separate deadly poisonous species from their look-alikes are hidden. Add scale, good light and a calm background. This is exactly how the camera in Gribo works – it guides you step by step through these three shots. But remember from the start: identification with a phone is a learning aid, not a verdict. It does not replace a mycologist.

Why is one photo from above not enough?

The most common mushroom photo on the internet is a brown or greenish cap in the grass. From a shot like that, many pairs of look-alikes cannot be told apart. Caps can look similar in species from completely different families, and identification usually depends on:

• the structure and colour of the underside of the cap,
• whether there is a ring and what it looks like,
• the appearance of the stem base – a volva, a bulb, a rim,
• a pattern or network on the stem,
• where it grows and which trees are nearby.

An example: from above, the death cap can resemble a brittlegill, and the difference only shows on the underside and at the stem base.

Shot 1: the cap from above

This photo shows the colour, texture and surface of the cap.

• Shoot straight down from above, so that the cap fills most of the frame.
• Check whether you can see scales, spots, fibres, slime or a striate margin.
• Gently remove stuck leaves or needles – but don’t wipe the cap hard, because you may remove veil remnants, which are an important feature.

Shot 2: the underside of the cap

The underside tells you the most about a mushroom. Show whether it has gills, tubes or spines, what colour they are and how they meet the stem.

• If the mushroom is still growing, crouch down low and shoot from below, from the side.
• If the mushroom has already been picked, tilt it so that both the underside of the cap and the top of the stem with the ring are visible.
• Try to show where the gills meet the stem – whether they are free, attached or running down the stem.

Shot 3: the stem base

This is the most important shot for safety and the one most often skipped. Amanitas have a bulb at the base, often hidden in the soil and wrapped in a volva. A mushroom cut off at ground level with a knife loses this feature for good.

• Gently brush the litter away from the stem base or twist out the whole fruiting body.
• Photograph the base close up, from the side, so it is clear whether there is a volva, a bulb or a rim.
• If the volva has torn off, look for it in the soil and show it as well.

With protected species, don’t pull up or damage anything – photos of the growing mushroom are enough. In many countries some fungi are protected by law, so check the rules where you forage.

Extra shots that help a lot

• The whole mushroom from the side. It shows the proportions of the cap and stem, the ring and the pattern on the stem.
• A cross-section (if the mushroom has been picked). It shows the colour of the flesh and whether it changes when cut, for example turning blue.
• The habitat. A wider frame with the trees, the substrate, a stump or a cluster. Many species grow only under particular trees or only on wood.

How do you show scale?

Size is an important feature, but a close-up does not show it. Put something of known size next to the mushroom: a coin, a ruler, a pocket knife, a lighter. A hand works too, but it is better not to touch unfamiliar mushrooms with bare hands, and wash your hands after contact with them.

Light: diffuse daylight

• Diffuse light is best. An overcast day or the shade of trees works well.
• Avoid flash at close range. It overexposes light caps and gills, flattens texture and distorts colours.
• Avoid harsh sunlight. It creates hard shadows and burns out light areas.
• Watch the colours. In a dense forest, photos easily come out greenish or yellowish. If something looks different from reality, note down the true colour.

Background and focus

• A calm, contrasting background. Dark litter sets off light mushrooms well, and a light sheet of paper or a pale leaf sets off dark ones. Avoid gaudy gloves and colourful baskets.
• Focus on the mushroom. On a phone, tap the screen where the mushroom is. Don’t get too close – many cameras lose focus then.
• Stability. Rest your elbows on your knees or lean the phone against a tree trunk.

What can’t a photo show?

Some features cannot be photographed: the smell, the texture of the flesh, the colour of the spore print. It is worth noting them in the description of your find. Check the smell by sniffing; never put an unknown mushroom on your tongue. You can read more about the features worth observing in our article on mushroom identification basics.

How does the Gribo app do it?

The camera in Gribo won’t let you settle for a single shot. It guides you through three photos: the cap from above, the underside and the stem base. This gives the model more information, and you learn straight away to look at a mushroom the way an experienced forager does. How your finds connect to Track Points, ranks and trophies (an optional extra for those who want it) is explained on the getting started page.

Still, an identification result is always a hint, not a decision. The photo may be blurred, species may differ in a feature that is not visible in a photo, and the model can be wrong. That is why:

• Whether a mushroom can be eaten is decided by a mycologist, not by an app. Look for a local mushroom inspection point or mycological society. In Poland, for example, sanitary-epidemiological stations (sanepid) assess mushrooms for free, and the expert examines specimens in person, not photos. More in our guide to mushroom safety.
• If poisoning is suspected, call the emergency number (112 in the EU), keep the mushroom leftovers and take them to the hospital. Photos from your phone can also come in handy then.

A good photo is a useful tool for learning and for sharing finds with your foraging companions. But the final word always belongs to a person who examines the mushroom with their own eyes.

Sources

• Chief Sanitary Inspectorate (Poland)