Years ago it was common practice when taking pictures of mushrooms in the field to place a common object beside the subject to give some idea of size. The photographer just dropped a penknife, pencil, ruler, or often a coin, close to the mushroom to give the scale. This practice seems out of favour in recent years and 'scale' objects are seldom seen nowadays in photographs. I am told that when the Audubon group were screening pictures for their book on mushrooms they wouldn't even consider pictures with 'foreign' objects lying around. Be that as it may, it does sometimes help and Laccaria tortilis is a case in point. This species is the smallest of the Laccaria species and as you can see from the picture that a cluster of six mushrooms can fit very comfortably on the face of a dime with room to spare! This cute mushroom has probably the largest spores of the Laccaria genus - up to 14 microns across and spiny. It fruits on bare muddy wet soil in woodland habitats.