G'day Jim, from The land down under. I usually take at least one Mushroom photograph a week and ahve done so for the last 5 or so years, I've got quite a collection of mushroom shots now, mainly taken in the local Botanical Gardens, which is only ten minutes from where I live, these are (Or were there maybe a larger one now) the largest Botanical Gardens in the southern hemisphere. The gardens include a state of the art Science Lab and plant bank. Getting back to your question the Head Scientist in the gardens had his PhD in Mycology (Fungi) I've asked him about how to go about identifying the various fungi and the answer he gave wsa interesting, but a littel scary. Bascially he told me he wouldn't eat any mushroom he found in the gardens as he could not positively identify them, he said he can look at them and narrow them down to a certain amount then do spore prints, (You put the cap of the mushroom on a sheet of clean paper and over a period of times the spores depost on the paper making a patern and colour, from this he can narrow it down further, the next step was to discect the fungi and examine it under a microscope from that he could probalby narrow it down to three or four differnt species. Opps thats someone whos PhD is in the field, so I don't feel so bad not being able to identif them, I can name a few of my local ones well what I think they are with reasonable confidence, you also need to know where they are growing, what trees they are growing under etc. so quite a list of things to start to ID them. So for now I'm happy to photography them and make images from that, and learn a few along the way. There are a few books out on the subject but agian a lot of these are local to your country, I know a few of the local Australian books, but you'll need to find some local to your country. Good luck. Here's a link to my journey of mushroom photgraphy so far, still going. Ive also got a Mushroom Galary on my website as well. I'm posting a few shots here in Cake and have started a Shroomshotsaturday theme so feel free to post to that each Saturday here in Cake.