Names, authorship and dates from Index Fungorum.

• BasidiomycotaPhylum
• └─ AgaricomycetesClass
• └─ BoletalesOrder
• └─ BoletaceaeFamily
• └─ CaloboletusGenus

Higher ranks from Catalogue of Life (COL26.9 XR).

Lifestylemycorrhiza

Warm deciduous and mixed woodland, parks, under oak, beech and linden

⚠ Before you pickWild fungi may be taken in small quantities for your own use (§39(3) BNatSchG) — but not in nature reserves or national parks, on closed land or on farmland in use, and never for sale (§39(4)). In Bavaria this right is anchored in Art. 141(3) of the state constitution and is limited to locally customary amounts; the competent authority is the district nature-conservation authority (untere Naturschutzbehörde). Local signs and ordinances come first.

Species protection from BArtSchV Annex 1 and §2(1), retrieved 2026-10-15; Red List from Dämmrich et al. (2016) (BfN / Rote-Liste-Zentrum). Not legal advice — local rules and signage may be stricter. BArtSchV Annex 1 · Red List data

• inedible mushroom

Inedible — intensely bitter, considered mildly toxic

• ▸ Pale grey to buff-brown cap
• ▸ Lemon-yellow pores that stain blue rapidly when touched
• ▸ Thick yellow stem with a faint net, tapering into a rooting, often buried base
• ▸ Flesh turning blue on cutting; bitter taste

Despite the bitter, inedible flesh, the large pale caps make it a striking find along warm woodland margins.