Synonyms: Agaricus graminum, Androsaceus graminum, Chamaeceras graminum.
Marasmius graminum is a small to medium-sized fungus that grows on grasses and other herbaceous plants. It has a bell-shaped cap that ranges in color from white to light brown, typically measuring 0.5-2 cm in diameter. The gills are widely spaced and the stem is slender, often hairy. In East and Central Texas, Marasmius graminum is commonly found in lawns, meadows, and along roadsides, particularly during the spring and fall months when moisture levels are higher. It tends to fruit in clusters or scattered groups, often on Bermuda grass, St. Augustine grass, and other turfgrasses. The fungus is considered saprotrophic, playing a role in decomposing organic matter and recycling nutrients in these ecosystems.
Grassblade Marasmius mushrooms (Marasmius graminum) on a lawn on campus of Texas A and M University. College Station, Texas, September 14, 2018
785 Ross St, College Station, TX 77840, USA
Grassblade Marasmius mushrooms (Marasmius graminum) in grass on golf course of Texas A and M University. College Station, Texas, June 28, 20201055 TX-6BUS, College Station, TX 77840, USA
Underside of grassblade Marasmius mushrooms (Marasmius graminum) in grass on golf course of Texas A and M University. College Station, Texas, June 28, 20201055 TX-6BUS, College Station, TX 77840, USA
Small mushrooms Marasmius graminum among dry grass on a lawn in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 202223360 Farm-to-Market Road 1155, Washington, Texas 77880, United States
Spores of small grass mushrooms Marasmius graminum from a lawn, collected in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2022Marasmius graminum has been observed in various locations in East and Central Texas, including lawns and golf courses at Texas A&M University in College Station, and a historic site in Washington, Texas. The fungus was found growing on grass blades in these areas, with observations made in different months, including June, September, and over a period of several years (2018-2022). The mushrooms were typically small and grew among dry or regular grass. Observations included the underside of the mushrooms, which provided additional details about their structure. Spores of the fungus were also collected from a lawn in Washington, Texas, for further study. These sightings suggest that Marasmius graminum is present in the region and can thrive in various environments, including lawns and golf courses with grassy areas. The fungus appears to be widespread in East and Central Texas.
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