Common name: Coprinopsis-like Ringless Amanita.
Amanita coprinopsoides is a small to medium-sized mushroom with a conical to bell-shaped cap that ranges in color from grayish-brown to brown, often with a umbo. The gills are free, crowded, and white to cream-colored. The stem is slender, hollow, and typically equal in width throughout. In East and Central Texas, Amanita coprinopsoides has been found growing in association with oak and pine trees, particularly in areas with rich soil and abundant leaf litter. It tends to fruit in the fall, often after significant rainfall events. The fungus is considered rare in the region, but can be locally common in suitable habitats.
Small brittle grisette mushrooms (Amanita sect. Vaginatae) with dark brown cap center Amanita coprinopsoides(?) on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020
Lone Star Hiking Trail, Richards, TX 77873, USA
Small brittle grisette mushrooms (Amanita sect. Vaginatae) Amanita coprinopsoides(?) on wet soil under pines on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020Lone Star Hiking Trail, Richards, TX 77873, USA
Group of small brittle grisette mushrooms (Amanita sect. Vaginatae) Amanita coprinopsoides(?) on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020Lone Star Hiking Trail, Richards, TX 77873, USA
Small brittle grisette mushrooms (Amanita sect. Vaginatae) with dark-brown cap center Amanita coprinopsoides(?) in area of frequent shallow pools on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020Lone Star Hiking Trail, Richards, TX 77873, USA
Side view of small brittle grisette mushrooms (Amanita sect. Vaginatae) Amanita coprinopsoides(?) on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020Lone Star Hiking Trail, Richards, TX 77873, USA
Fragile grisette mushroom Amanita sect. Vaginatae with a dark cap center, could be coprinopsis-like ringless Amanita (Amanita coprinopsoides), on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Underside of a fragile grisette mushroom Amanita sect. Vaginatae, could be coprinopsis-like ringless Amanita (Amanita coprinopsoides), with a dark cap center on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Small mushrooms coprinopsis-like ringless Amanita (Amanita coprinopsoides) on a sandy path covered by leaves in Lick Creek Park. College Station, Texas, September 15, 202014802 Rock Prairie Rd, College Station, TX 77845, USA
Small mushrooms coprinopsis-like ringless Amanita (Amanita coprinopsoides) on a sandy path covered by leaves in Lick Creek Park. College Station, Texas, September 15, 2020Iron Bridge Trail, College Station, TX 77845, USA
Grey striate cap of small mushrooms coprinopsis-like ringless Amanita (Amanita coprinopsoides) on a sandy path covered by leaves in Lick Creek Park. College Station, Texas, September 15, 2020Iron Bridge Trail, College Station, TX 77845, USA
Coprinopsis-like Ringless Amanita mushroom (Amanita coprinopsoides) on a sandy path in Lick Creek Park. College Station, Texas, August 12, 2021Iron Bridge Trail, College Station, TX 77845, USA
Underside of Coprinopsis-like Ringless Amanita mushroom (Amanita coprinopsoides) on a sandy path in Lick Creek Park. College Station, Texas, August 12, 2021Iron Bridge Trail, College Station, TX 77845, USA
Small mushrooms Amanita coprinopsoides(?) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Underside of small mushrooms Amanita coprinopsoides(?) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Spores of mushrooms Amanita coprinopsoides(?) collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022
Spore size 9.5 - 11.7 × 5.7 - 6.7 µm, length to width ratio Q = 1.63 - 1.8.Observations of Amanita coprinopsoides in East and Central Texas reveal that the fungus grows in various environments, including wet soil under pines and areas with frequent shallow pools. The mushrooms are typically small and brittle, with dark brown cap centers, and are often found on trails such as Richards Loop Trail and Caney Creek Trail in Sam Houston National Forest. They have also been spotted in Lick Creek Park in College Station, growing on sandy paths covered by leaves. The fungus has been observed during different times of the year, including April, September, and August, with some sightings featuring groups of mushrooms while others show individual specimens. Spores of the mushrooms were also collected for further study. The observations suggest that Amanita coprinopsoides is widely distributed in East and Central Texas, and can thrive in a range of habitats.
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