Bitter Bolete
Tylopilus felleus
Meet Bitter Bolete, Tylopilus felleus, through field marks, range, soil ecology, safety context, community discovery, and its living role.
At a glance
- TypeFungus recorded in the plant queue
- RangeThe map combines cited range units with public observation records for Bitter Bolete.
- Field marksbrown cap with a thick bolete shape, pinkish pores as it matures, dark net-like pattern on the stem
- SeasonPeak clues: Jul-Aug-Sep-Oct
- SafetyObservation and caution only
How to recognize it
Look for brown cap with a thick bolete shape, pinkish pores as it matures, dark net-like pattern on the stem before relying on one clue.
Brown Cap With A Thick Bolete Shape
brown cap with a thick bolete shape is one practical field mark to photograph when checking Bitter Bolete.
Pinkish Pores As It Matures
pinkish pores as it matures is one practical field mark to photograph when checking Bitter Bolete.
Dark Net-Like Pattern On The Stem
dark net-like pattern on the stem is one practical field mark to photograph when checking Bitter Bolete.
Lookalikes & how to tell them apart
Use several visible clues and the habitat together before comparing lookalikes.
King Bolete
Compare King Bolete with brown cap with a thick bolete shape and pinkish pores as it matures.. King Bolete can overlap in color, habitat, or general shape, so the whole plant, season, and surrounding habitat matter.
Bay Bolete
Compare Bay Bolete with brown cap with a thick bolete shape and pinkish pores as it matures.. Bay Bolete can overlap in color, habitat, or general shape, so the whole plant, season, and surrounding habitat matter.
Bitter Forest Tester at work
Brown cap with a thick bolete shape is the detail that slows the eye first. On Bitter Bolete, it sits with pinkish pores as it matures and dark net-like pattern on the stem, so the plant becomes more than a name on a tag. It gives a person something visible to compare: shape, texture, season, and the ground around it. That first look matters because Bitter Bolete is a bitter forest tester, a subject whose story begins in a small field mark and then opens into soil, weather, people, and other living things.
Bitter Bolete looks like a generous woodland bolete, but its pinkish pores and bitter reputation make it a lesson in slow comparison. That is the line worth carrying outside. The strongest clue is not one isolated feature, but the way several clues meet. Bitter Bolete belongs to Boletaceae, and the public records behind this page place it in a wider map of observations and cited range references. The map should be read as a careful guide to reported and cited presence, not as a promise that every suitable place has been found. Living things leave uneven records because people notice them unevenly.
The first public discovery behind this page came from Mystic-Naturalist-9 in MO, United States on 2026-07-02. The location is intentionally coarse, which keeps the record useful without exposing a private spot. From that starting point, recognition becomes a patient habit. Photograph the whole plant, then move closer for brown cap with a thick bolete shape, pinkish pores as it matures, and dark net-like pattern on the stem. If the subject is young, dry, clipped, shaded, or past bloom, the best clue may be the setting rather than the most colorful part.
Lookalikes such as King Bolete and Bay Bolete are reminders to compare more than one trait. A similar leaf or flower can mislead when it is pulled away from the stem, season, and habitat. Bitter Bolete is usually described with woodland soil near tree roots. That habitat note is not decoration. It tells you where the species can gather water, light, shelter, and the quiet help of soil organisms. When you compare a possible match, include the neighboring plants and the surface under your feet.
The ecological story is grounded in ordinary work. Bitter Bolete forms partnerships with trees and sends its fruiting body up after damp weather. Its soil relationship is just as important: it works from root-zone soil and leaf litter, where fungal threads trade with trees and return nutrients as mushrooms age. Soil is not a backdrop here. It is where roots, old leaves, moisture, fungi, and small animals keep the next season possible. Its mild-looking cap hides an intense bitterness, so even a tiny taste is famous for spoiling a whole basket of edible-looking boletes.
A useful field prompt is simple. Pause at the edge of the plant and look from far to near. Notice the whole outline first, then the leaf, flower, stem, fruit, or seed head, then the soil or litter below it. Compare what you see with the season and the setting. Leave room for uncertainty, take one clear photo of the whole plant and one close detail, and let the next look add what the first look missed.
Its place in the ecological web
Bitter Bolete acts as a bitter forest tester in its setting.
When to look
Most public clues for Bitter Bolete appear when Jul, Aug, Sep, Oct conditions show its visible growth.23
- Peak bloom
- Fading & dried heads
- Leaves out
Found one? Keep a field journal
Save this species to your journal, earn its badge, and see community discoveries on an approximate, privacy-safe map.
- 1Coarse discovery location only
- 2Exact location and private photos are not shown
Bitter Bolete badge
Earned when you identify this species in Leafari.
In the Leafari community
First found in MO, United States, by Mystic-Naturalist-9
Sources
Key facts and claims trace back to a named reference. Superscript numbers in the text link here.
- GBIF species record for Tylopilus felleus distribution
- First Nature profile for Tylopilus felleus natural-history
- GBIF distribution records for Tylopilus felleus range
- Wikimedia Commons image source for Bitter Bolete image
- Leafari app records product-snapshot