Body shape looks like a sac spider. They are always on the underside of a leaf, blending in almost perfectly, and confident enough in their camouflage to stay completely still while photographed from half an inch away. And yet, this is still the best photo I can get, because they blend in so well that the light meter doesn't know what to do and autofocus is thwarted. Maybe some sort of Clubiona? They do seem greener than any species I can find, but maybe it's just a trick of the light coming through the leaf. Thoughts? Suburban native plant garden between Boston and the Middlesex Fells.