Rimbachia bryophila is a species of fungus that belongs to the family Tricholomataceae. It is a small, delicate mushroom that grows on mosses and other non-vascular plants. In East and Central Texas, Rimbachia bryophila has been found in moist, shaded areas with abundant moss growth, typically on tree trunks, rocks, and soil. The fungus produces tiny, white to pale yellowish caps that are 1-5 mm in diameter, with gills that are similarly colored. It fruits from spring to fall, with peak activity during the warmer months.
Tiny veined mossear mushrooms Rimbachia bryophila parasitizing on mossy bark of a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 11, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Underside of veined mossear mushrooms Rimbachia bryophila on mossy bark of a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 11, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
White oysterling mushrooms Rimbachia bryophila on mossy bark of a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 11, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Small moss oysterling mushrooms Rimbachia bryophila on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Small oysterling mushrooms Rimbachia bryophila on a mossy fallen but still living elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Tiny white oysterling mushrooms Rimbachia bryophila on a mossy bark of a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Tiny white oysterling mushrooms Rimbachia bryophila on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Tiny mushrooms veined mossear (Rimbachia bryophila) in moss at the base of an oak in Little Thicket Nature Sanctuary near Cleveland. Texas, June 26, 2021 151 Oxbo, Cleveland, TX 77328, USA
Veined mossear mushrooms (Rimbachia bryophila) at the base of an oak in Little Thicket Nature Sanctuary near Cleveland. Texas, June 26, 2021 151 Oxbo, Cleveland, TX 77328, USA
Veined mossear mushrooms (Rimbachia bryophila) together with pixie-hair lichen (Coenogonium implexum) at the base of an oak in Little Thicket Nature Sanctuary near Cleveland. Texas, June 26, 2021 151 Oxbo, Cleveland, TX 77328, USA
Close-up of veined mossear mushrooms (Rimbachia bryophila) at the base of an oak in Little Thicket Nature Sanctuary near Cleveland. Texas, June 26, 2021 151 Oxbo, Cleveland, TX 77328, USA
Veined mossear mushrooms Rimbachia bryophila on mossy bark of a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 4, 2022 Lone Star Hiking Trail, Montgomery County, Texas, United States
Close-up of veined mossear mushrooms Rimbachia bryophila on mossy bark of a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 4, 2022 Lone Star Hiking Trail, Montgomery County, Texas, United States
Spores of tiny white pleurotoid moss parasite mushrooms Rimbachia bryophila from a fallen elm collected in Sam Houston National Forest near Montgomery. Texas, September 4, 2022
AI-generated summary of observations
Observations of the fungus Rimbachia bryophila in East and Central Texas reveal that it parasitizes on mossy bark of fallen trees, particularly elms. The mushrooms were found on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest and Little Thicket Nature Sanctuary near Cleveland. They appear as tiny, veined, or white oysterling mushrooms, often growing in clusters on mossy bark. The fungus was observed on both fallen and still living trees, and its spores were collected for further study. The observations span multiple dates, including September 2020, June 2021, and September 2022, indicating that the fungus is present in the region throughout the year. The mushrooms often co-occur with other organisms, such as pixie-hair lichen, and can be found at the base of oak trees as well.