The vegetation of the Pacific Northwest, the fauna I guess, is dizzying not only in its teeming variety but its mad fecundity. Perhaps there's just as much variety in the my Midwest. But to leave Chicago in late March and drop into Oregon or Washington makes the contrast seem even more stark. This is as true in the midst of a fairly big city like Portland as it is when you go traipsing into the countryside of the Northwest. Or driving. Or strolling, I suppose. Or otherwise conveyed. I sat in my friends' kitchen in Portland and watched the moss adhering to one of their backyard trees practically glow subsequent to an afternoon rain. So it seems to go with the moss and lichen in this part of the world. I stopped along a particularly verdant stretch the Umqua River valley in Oregon several years ago to clamber down to a creekside and it seemed as though my rental car itself would start to grow some some of the s...