Stemonitis sp. Rock Creek Park, Washington, DC, USA.
Fungi? Slime mould? I'm stumped. Spores very tiny, slightly oval.
On tree trunk in Myrtle Rainforestbon Balfour Track in the Tarkine
Stemonitis is a distinctive genus of slime moulds found throughout the world (except Antarctica). They are characterised by the tall brown sporangia, supported on slender stalks, which grow in clusters on rotting wood. Identification within the genus is difficult, and can only be performed with confidence using a microscope.