Mushrooms · La Saladita, Guerrero

Cracked Cap Polypore

Fulvifomes robiniae

Spanish: Hongo de gorra parda

Cracked Cap Polypore (Fulvifomes robiniae)
Photographed by adrian_mora on iNaturalist

Fulvifomes robiniae, commonly called the cracked cap polypore, is a fungus of the family of Hymenochaetaceae. The fungus primarily infests black locusts, aided by openings caused by Megacyllene robiniae infestation, but also grows on various other trees such as Carya, oak, and Acacia. Cracked cap polypore is sympatric with most of its hosts. It has a brown spore print, leaving brown streaks on the tree below the fungus. Most often recorded in Aug.

TaxonomyAgaricomycetes › Hymenochaetales › Hymenochaetaceae
Local records1 research-grade observation within about 50 km of La Saladita (the survey box also takes in Zihuatanejo, Ixtapa and Troncones)
Global records12,914 on iNaturalist
Recorded here2025 – 2025
Months recorded near La Saladita
JanFebMarAprMayJunJulAugSepOctNovDec
Recent local sightings

Interactive card with more photos, sounds and similar species Mushrooms guide iNaturalist Wikipedia

Cite as: “Cracked Cap Polypore (Fulvifomes robiniae) at La Saladita”, La Saladita Field Guide, lasaladita.com/species/fulvifomes-robiniae/, updated 2026-09-26. Observation counts and months come from iNaturalist research-grade records within about 50 km of 17.8375°N, 101.7606°W (the survey box also takes in Zihuatanejo, Ixtapa and Troncones); summary text from Wikipedia where present.