Arcyria sp. (genus) (A slime mould)

The genus Arcyria dates back to Linnaeus in 1753 through the type species A. denudata.

The genus Arcyria contains 55 accepted species (Lado 2024)., mostly stalked, often in large groups easily seen with the naked eye. Many are common, and distributed worldwide. Collectors often encounter these colorful species on decaying logs as clusters of many sporangia often covering extensive areas.

Sporocarps predominantly stalked, sometimes several growing on the common stalk (digitate), occasionally colonial fructifications consisting of sessile, heaped sporocarps. If sporocarps are stalked, peridium rapidly evanescent leaving the cup at the base of sporothecae. 
Capillitium composed of network of elastic tubules, firmly or loosely attached to the cup and/or the apex of the stalk. If sporocarps colonial, peridium usually more persistent and capillitium is of simplified structure, e.g. lax, non-elastic net. 
Capillitium tubules ornamented with warts, spines, clavate protuberances, spirals, half-rings, rings, reticulum, parallel 
veins, or combinations thereof. Spores typically ornamented with minute warts with groups of larger warts,