Synonyms: Arcyria albida, Arcyria bicolor, Arcyria cookei, Arcyria digitata, Arcyria friesii, Arcyria leprieurii, Arcyria pallida, Arcyria stricta, Arcyria tenuis, Arcyria trichioides, Clathroides cookei, Clathroides digitatum, Comatricha alba, Lachnobolus arcyrella, Stemonitis cinerea, Stemonitis digitata, Stemonitis glauca, Stemonitis grisea, Trichia cinerea.
Arcyria cinerea is a species of slime mold that belongs to the phylum Mycetozoa. It is characterized by its greyish-brown to dark brown sporangia, which are typically 1-3 mm tall and 0.5-1.5 mm wide. The sporangia are cylindrical to clavate in shape and have a rounded apex. The capillitium is dense and consists of tubular elements with spiny ornamentation. In East and Central Texas, Arcyria cinerea has been found on decaying logs, stumps, and other woody debris in moist, shaded areas, often associated with rich soil and abundant vegetation. It typically fruits in the spring and summer months, with peak activity occurring during periods of high humidity and warm temperatures.
Arcyria cinerea slime mold on a wet log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, May 5, 2018
Lone Star Hiking Trail, Montgomery, TX 77356, USA
White fruiting bodies of Arcyria cinerea slime mold on a rotting log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, May 5, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Arcyria cinerea slime mold on a rotting log in Lick Creek Park. College Station, Texas, May 28, 2018Iron Bridge Trail, College Station, TX 77845, USA
Close up of Arcyria cinerea slime mold on a rotting log in Lick Creek Park. College Station, Texas, May 28, 2018Iron Bridge Trail, College Station, TX 77845, USA
Arcyria cinerea slime mold on a rotting pine log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, June 7, 2019Lone Star Hiking Trail, Montgomery, TX 77356, USA
Masses of Arcyria cinerea slime mold on a rotting pine log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, June 7, 2019Lone Star Hiking Trail, Montgomery, TX 77356, USA
Mold like fungus on mature Arcyria cinerea on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 31, 2019Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Arcyria cinerea slime mold on a rotting pine log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, March 29, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Arcyria cinerea slime mold with a wolf spider on a rotting pine log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, March 29, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Masses of Arcyria cinerea slime mold on a log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, March 29, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Sporangia of Arcyria cinerea slime mold on a log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, March 29, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Slime mold Arcyria cinerea on a large fallen pine without bark on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 11, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Slime mold Arcyria cinerea on a wet mossy fallen pine without bark on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 11, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Close-up of slime mold Arcyria cinerea on a fallen on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 11, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Pattern of slime mold Arcyria cinerea on a fallen on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 11, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Arcyria cinerea slime mold on a log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, June 18, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of Arcyria cinerea slime mold on a log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, June 18, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Slime mold Arcyria cinerea on rotting wood in Lick Creek Park. College Station, Texas, June 25, 202114802 Rock Prairie Rd, College Station, TX 77845, USA
Close-up of slime mold Arcyria cinerea on rotting wood in Lick Creek Park. College Station, Texas, June 25, 202114802 Rock Prairie Rd, College Station, TX 77845, USA
Sporangia of slime mold Arcyria cinerea on rotting wood in Lick Creek Park. College Station, Texas, June 25, 202114802 Rock Prairie Rd, College Station, TX 77845, USA
Slime mold Arcyria cinerea on rotting wood in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 7, 2021Old Washington Town Site Loop Trail, Washington, TX 77880, USA
Slime mold Arcyria cinerea on an oasage orange(?) log in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 7, 2021Old Washington Town Site Loop Trail, Washington, TX 77880, USA
Close-up of slime mold Arcyria cinerea on a rotting log in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 7, 2021Old Washington Town Site Loop Trail, Washington, TX 77880, USA
Slime mold Arcyria cinerea on a large wet pine log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 4, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of slime mold Arcyria cinerea in KOH from a wet pine log, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 4, 2022
Spores of slime mold Arcyria cinerea in iodine solution (Lugol), collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 4, 2022The species of slime mold Arcyria cinerea was observed in East and Central Texas over a period of four years (2018-2022). The majority of sightings were in Sam Houston National Forest, specifically on the Caney Creek Trail and Stubblefield section of Lone Star hiking trail. The slime mold was found growing on rotting logs, pine wood, and mossy fallen trees. Observations were made during various months, including May, June, July, August, and March. Some observations included close-up photos of the slime mold's sporangia and spores. The species was also spotted in Lick Creek Park and Washington-on-the-Brazos State Historic Site. The consistent presence of Arcyria cinerea in these areas suggests that it is a common species in East and Central Texas, thriving in moist environments with abundant organic matter.
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