they don't look like any marjoram i've seen.
My apologies, I was misinformed.......check out these links
http://my.gardenguides.com/forums/topic/27022
http://search.yahoo.com/search?p=Plectranthus+amboinicus&toggle=1&cop=mss&ei=UTF-8&fr=yfp-t-701
http://www.onthetabl...anoregano.shtml