Myco contains information about 300+ types of mushrooms, with zoomable image. Data is structured by occurence, characteristics, edibility and possible confusions. Most information is taken from Wikipedia but available offline - should there be no connection while collecting mushrooms in the forest. Store your locations with GPS position and take a picture of the mushroom and its surroundings, so you'll be sure to find the place again. For each location you can save location, date and time, multiple photos and a comment.