Psathyrella longistriata

The cap of Psathyrella longistriata is about 1.7-5 centimeters in diameter. It starts out rounded and conical in shape, before becoming campanulate. Tissue from the partial veil sometimes hangs from the margins.^[1] The margin of the cap is striated when moist.^[3] These striations usually appear when the mushroom is older.^[4] The cap also starts out fibrillose.^[3] The stipe is about 3-9 centimeters long and 8-15 millimeters wide.^[3] It also has an annulus, which is striated on the top.^[3] The gills start out grayish buff in color, becoming darker and browner with age.^[1] The spore print is dark purplish brown.^[3]

Psathyrella kauffmanii is similar, as it also has an annulus. It is found in eastern North America, as well as the American Southwest and the Rocky Mountains.^[2] Psathyrella ellenae var. yubaensis also has an annulus, but it is smaller than P. longistriata and is not fibrillose. Its annulus and cap are also not striated.^[3]

Psathyrella longistriata is found in low-elevation forests, where it grows out of rotting wood or leaf litter. It mostly fruits during fall, but occasionally in winter and spring.^[1]