The dominance of the squeaky-clean white button has given way to a far wider range: brown chestnuts and flat-capped portobellos, and pearly-white oysters, which really do look a bit like the oyster shells they’re named after, carotene-orange girolles, flavour-bomb dried shiitake and porcini, or delicate enoki, with their long, skinny legs and tiny caps, which are often sold in packages with buna and shiro shimejis and labelled “exotic”.
Source: wiktionary