There are plenty of different wild grasses and other seed bearing plants that paleo people ground into food. They just probably werent doing it to the extent that we do today. Most wild grasses make edible seeds, some just aren't large enough to bother with, but many are. It just depends where on the planet you're talking about
and what a paleo culture, and what the native flora had to offer there. For example in California, people from over 100 different cultures we're relying heavily on acorns. Not a grain, granted, but still a carb. And there were many many wild grasses and other seeds that were eaten as well, some of which could probably be considered staples, at least seasonally.
Post Edited (freddyj) : 2/18/2013 10:10:05 AM (GMT-7)