Is this moldy weed? (with pic)

It's very dried out now, because its been around like 3-4 months, but I initially stopped using it because I thought the white spots were mold. However, they are in spots I wouldnt expect, like if i break off a little chunk, the part that was holding it on is white..

It's also been relatively untouched for a few months in a sterile glass jar - I assumed it drying out the white would disappear, but its the same as day 1.

First time ive ever come across something like this... anyone have any ideas?

(PS - The photo doesnt show as white as it actually is.. its a few shades whiter than whats seen)

http://img273.imagevenue.com/img.php...e_123_63lo.jpg