Luminescent Panellus that was growing on the in-laws' property.
This is a 92-sec long bulb-exposure. I then cropped it and enhanced the green in PS to bring out the fungus structure. It's a remarkable sight and they've had a batch here or there growing off of the driveway for the past two or three years. I'll try this again this year if there is another patch. I left it at a low ISO in the hopes of reducing the noise.
I didn't have a tripod so I used my jacket to hold the camera like a sandbag and used my Adidt remote to trigger the camera.