All, I recently came across a book that would probably appeal to most PBS members although the topic is geophytic only by a stretch of imagination. "Field Guide to North American Truffles" I was surprised that there were north American truffles as they had not appeared in my mushroom hunting guides of yore. I was also surprised that, unlike mushrooms, the (raw) spores are indigestible and they are designed to be eaten (especially by voles). The introductory pages says they are mostly basidiomycetes and ascomycetes that evolved from the above-ground mushrooms with wind-born spores. Hence, the appealing aromas that increase as the spores mature so animals can find them better. Happy Truffle Hunting! Tim Eck