set of linear drawing mushrooms

agaric amanita art background ballpoint beauty biology biro blob boletus botany cantharellale champignons collection contour copybook drawing drop ecology element food forest fungus graphic handdrawn ink lined monochrome morchella morel mushrooms nature oldfashioned paper pen pencil retro ruled russule set single sketch sketchbook splotches summer toadstool tricholoma writingbook writingpad