by Mark Willstatter » Sun Feb 10, 2008 10:00 pm
Marjoram and oregano are both species of Origanum and all are native to Europe (mostly the Mediterranean) and Asia. So whether oregano is called "Mexican" or otherwise, none of it is native to the New World. Culinary oregano is, as a rule, Origanum vulgare and there are many variations that have blossoms that mostly range from white through pink. If you want to guess what it is you have, the best resource I know is the Sunset Western Garden Book. This is the standard garden "bible" in the American West, particularly in California. I see you are in Santa Clara, so if you don't own a copy, your neighbor probably does. Just look under "O" for Origanum!