Synonyms: Agaricus hirneolus, Agaricus undulatus, Clitocybe hirneola, Clitocybe undulata, Clitocybe xanthophylla, Clitopilopsis arthrocystis, Clitopilus hirneolus, Clitopilus undulatus, Hylophila undulata, Omphalia hirneola, Omphalia parilis, Rhodocybe hirneola, Rhodophyllus hirneolus.
Clitopilopsis hirneola is a species of fungus that belongs to the family Entolomataceae. It is a small to medium-sized mushroom with a grayish-brown cap and pinkish-gray gills. In East and Central Texas, Clitopilopsis hirneola has been found growing in clusters on soil, decaying wood, and other organic matter, often in wooded areas and along streams. The fungus typically fruits from spring to fall, with peak activity during the summer months. Specimens collected in this region have been reported to have caps ranging from 1-4 cm in diameter and stems up to 6 cm tall.
Clitopilopsis hirneola and some small gilled mushrooms on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, September 15, 2018
Clitopilopsis hirneola mushrooms on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, September 15, 2018
Young Clitopilopsis hirneola (Rhodocybe hirneola) mushrooms on burnt ground in a pine forest on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, October 6, 2018
Small grey Clitopilopsis hirneola (Rhodocybe hirneola) mushrooms on burnt ground in a pine forest on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, October 6, 2018
Funnel mushrooms Clitopilopsis hirneola among pine needles on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020
Small grey mushroom Clitopilopsis hirneola together with orange mosscap (Rickenella fibula) on Richards Loop Trail in Sam Houston National Forest. Texas, July 21, 2021
Small grey mushrooms Clitopilopsis hirneola on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 4, 2022
Spores of small grey mushrooms Clitopilopsis hirneola collected in Sam Houston National Forest near Montgomery. Texas, September 4, 2022
Mushrooms Clitopilopsis hirneola(?) in a pine forest on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Gills of a mushroom Clitopilopsis hirneola(?) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Underside of a mushroom Clitopilopsis hirneola(?) found in a pine forest on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Spores (in KOH) of a mushroom Clitopilopsis hirneola(?) collected from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Spores (in lugol) of a mushroom Clitopilopsis hirneola(?) collected from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025Observations of Clitopilopsis hirneola in East and Central Texas reveal that the fungus grows in various locations within the Sam Houston National Forest. On Caney Creek section of Lone Star Hiking Trail, it was found on September 15, 2018, and again on September 26, 2020, among pine needles. The mushrooms were also spotted on burnt ground in a pine forest on Caney Creek Trail on October 6, 2018, and on Richards Loop Trail on July 21, 2021, where they co-occurred with orange mosscap. Further observations on September 4, 2022, confirmed the presence of small grey Clitopilopsis hirneola mushrooms on Caney Creek Trail, with spores collected for analysis. The fungus appears to thrive in pine forests and can be found in association with other fungi and plant species. Its growth is not limited to specific seasons, with sightings recorded from July to October.
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