Synonym: Coprinus spilosporus.
Coprinopsis spilospora is a species of fungus that belongs to the family Psathyrellaceae. It is a small to medium-sized mushroom with a bell-shaped cap that ranges in color from pale yellowish-brown to dark brown, often with a powdery appearance due to the presence of fine scales or spores. The gills are crowded and free from the stem, turning black and inky as the spores mature. In East and Central Texas, Coprinopsis spilospora can be found growing in clusters on rich soil, dung, or well-rotted wood, particularly in moist areas such as near streams or in wooded valleys, typically during the spring and fall months.
Inkcap mushroom Coprinopsis spilospora after a recent prescribed burn on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021
Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Inkcap mushroom Coprinopsis spilospora on burned ground on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Close-up of inkcap mushroom Coprinopsis spilospora on burned ground on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Side view of inkcap mushroom Coprinopsis spilospora on burned ground on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Cross section of inkcap mushroom Coprinopsis spilospora on burned ground on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Small mushrooms Coprinopsis spilospora on a hill with pine forest on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 16, 2022Lone Star Hiking Trail, Walker County, Texas, United States
Close-up of small mushrooms Coprinopsis spilospora on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 16, 2022Lone Star Hiking Trail, Walker County, Texas, United States
Gills of Coprinopsis spilospora mushrooms on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 16, 2022Lone Star Hiking Trail, Walker County, Texas, United States
Spores of a mushroom Coprinopsis spilospora collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, July 16, 2022
Inkcap mushrooms Coprinopsis spilospora on partially burned pine litter on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Cross section of inkcap mushrooms Coprinopsis spilospora on partially burned pine litter on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores and basidia of inkcap mushrooms Coprinopsis spilospora under a microscope (x40 objective) collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022
Spores, basidia and cystidia of inkcap mushrooms Coprinopsis spilospora (x40 objective) collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022
Spores of inkcap mushrooms Coprinopsis spilospora (x100 objective, in Congo Red) collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022
Basidia and spores of inkcap mushrooms Coprinopsis spilospora (x100 objective) collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, August 13, 2022
Spores of inkcap mushrooms Coprinopsis spilospora from partially burned pine litter under a microscope in KOH collected in Sam Houston National Forest two days before and similar to this day findings. Texas, August 13, 2022Coprinopsis spilospora was observed in East and Central Texas, particularly in the Sam Houston National Forest near Montgomery. The fungus was found on burned ground and partially burned pine litter after a prescribed burn on Sand Branch Loop Trail. It was also spotted on a hill with pine forest on the Stubblefield section of Lone Star hiking trail. The mushrooms were small, and close-up views revealed their gills and spores. Microscopic examination of the spores, basidia, and cystidia was conducted, and observations were made using various objectives and stains, including Congo Red and KOH. The fungus was observed on multiple occasions between March 2021 and August 2022, indicating its presence in the area during different times of the year.
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