Doesn't all beer have yeast?
If we're talking about weissbier / hefeweizen, you should refer to them as either of those names. Hefe is yeast. Weizen is the wheat. Hefeweizen is the German term and Weissbier is the Bavarian dialect for it. Weiss being white as the beer is somewhat white in complexion. blah blah blah. I know. People referring to wheat beers as hefe beers reminds me of the time I went up to a bar in Heidelberg and asked for "Three wiess." I figured, "of course I'm referring to beer. i'm not referring to crayons." Well after a few exchanges, he figured out I wanted Wiessbiers and not Wiess.
ok, enough bitching. Sorry.
Gerald