Should anyone dismiss lichens as so much gray-green crust, send the detractor to the lichen glamour shots in this Web site’s portrait gallery. The lush photography details shapes from goblets to anchors and colors from blue to neon Lycra-pants lemon. Other images illustrate the importance of lichens for other creatures (see the flying squirrel nest) and as environmental monitors (see the comparison shots of lichens on tree trunks in clean and polluted air).