Fungi to observe · Boletus edulis
Discover the porcini mushroom
A thick stem and a brown cap: the porcini makes Puschel curious. Together, the Wusels look at its sponge-like underside.
The short answer
A stout stem and usually brown cap are clues. Under the cap are many tiny tube openings rather than thin gills. Other fungi can look similar. We do not collect or eat mushrooms based on pictures.
See the connection
Simplified drawings, not to scale. Not a guide for identifying species.
An imagined Wusel scene
Puschel and Flauschi investigate
Puschel stops behind an old log. Puschel“That one has a really thick stem!” Flauschi sits on a rock, studying its brown cap. A naturally tilted fungus lets them see the tiny pores underneath. They look from afar without touching it.
Fungus facts
Three things to notice
Shape
Porcini have stout stems and usually brown caps.
How it lives
Many tiny tube openings form a pore surface beneath the cap instead of gills.
In the forest
Their fungal threads live in partnership with tree roots, helping each other.
Try explaining it
What lies underneath a porcini cap?
Choose a), b) or c), then explain your choice.
- a)Thin gills like those of some other cap mushrooms.
- b)Thick ridges running down the stem as in a chanterelle.
- c)Many small tube openings.
Show the explanation
Correct: c): Many small tube openings.
Tiny tube openings lie under the cap. This feature alone cannot safely identify a fungus.
Word help
- gills
- Thin blade-like surfaces under some mushroom caps; fish gills have a different role in breathing.
- spore
- A tiny unit that helps fungi or ferns spread. In suitable conditions it can start further development. It is not a seed.
- mycelium
- A network of fine fungal threads, often hidden in soil or wood.
- fruiting body
- The spore-producing part of a fungus. A cap and stalk are one example, not the whole fungus.
- gill
- A thin blade-like surface beneath some fungal caps. Spores can form on it.
- pore
- A tiny opening. In pore-bearing fungi, these openings lie underneath the fruiting body.
- mineral
- Here, a mineral nutrient such as potassium. Plants usually absorb these nutrients dissolved in water; they are not ready-made sugar.
Explore in more detail
Here you will find longer explanations and further details. You can explore them together.
Why look beyond the cap?
The brown top is only part of the fruiting body. Closely packed tubes underneath have openings resembling tiny holes in a sponge. Spores form inside them. The sponge-like area is therefore involved in reproduction, rather than being padding for the cap.
Compare and understand
Fungal threads associate with tree roots underground. The fungus receives sugar; the tree can receive water and minerals through the association. This is not simply a solitary plant growing from soil. Other fungi, including inedible or poisonous ones, also have pores; the picture is not a foraging guide.
An optional question for further exploration
You can use the longer explanation above. This is extra, not needed for the first quiz.
Mini quiz
An extra question
What distinguishes the underside of a porcini cap from a gilled surface?
Show answer
Porcini have many small tube openings instead of gills. Leave the fungus growing while observing it.