Rolanberry: A tart fruit-one of few still found growing in the devastated region of Mor Dhona.
Dark Frog: This tiny frog found in the swamps and lakes of the Black Shroud secretes a powerful poison known to induce paralysis.
Perhaps of note, too, is that you can harvest earth shards in this otherwise water-dominant area (maybe even fire because of the hot springs). Was this area at one time desert? There's a quest line in Thanalan that talks about Goobs carrying and transplanting items (and critters?) on their backs, but there's no Goobs in that zone. The closest is in E. LaNosc to the south, but even then the Goobs are way south in that zone. That said, how did we get Mordo fruit and Shroud frogs?

Oakwood has some "native" species, but you also find "Far to the east" sticky rice as well as pixie plums from Coerthas. Hmmm!