you know i was hanging with some friends friends and one of them started puking later that night a lot and while i think part of it was because he was new to the game and hadnt eaten/drank anything really all day and this was later at night. also i was looking at their bud and it was really dry and little white spots on it, much like what your saying. i dont think it was laced, because you can clearly tell, but maybe picked prematurely or even mold. i know it wasnt good and i didnt have more than a hit or two....i was too busy loading my phx with some fine trainwreck.

moral of the story: if it doesnt smell like pot....doesnt look like pot...DONT SMOKE IT.