Synonyms: Agaricus stercorarius, Coprinus stercorarius, Coprinus stercoreus, Cortinarius stercorarius, Fungus stercorarius.
Coprinopsis stercorea is a species of fungus that grows on dung, particularly from herbivores. In East and Central Texas, it has been found to fruit in the spring and fall, typically on cow and horse dung in pastures and fields. The fungus produces small to medium-sized bell-shaped caps that are initially white or light brown, turning black and inky as they mature and release their spores. It is a relatively common species in the region, often appearing in large numbers after rainfall.
Observations of the fungus Coprinopsis stercorea in East and Central Texas reveal its growth on horse dung. On November 3, 2019, tiny inkcap mushrooms were found on Sand Branch Loop Trail in Sam Houston National Forest near Richards. The underside of the mushroom was observed, as well as its side view, showcasing its small size. The cap of the mushroom was also examined, highlighting its distinctive features. Multiple tiny inkcap mushrooms were found growing together on horse dung, indicating a thriving colony. These observations suggest that Coprinopsis stercorea is well-adapted to growing on horse dung in this region, and can be found in abundance in areas with suitable substrate. The fungus appears to thrive in the conditions present in Sam Houston National Forest.
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