Lambs ear is a perrennial here in vermont, and dusty miller is an annual, they look very similar in color and texture, but leaves are differently shaped, I think dusty miller is much firmer. I waited until the last miniute and glued it into the bouquet on the top of lemon leaves, I also used some dusty miller with the lambs ears. The boutonnieres were fine the next morning. I am glad that wedding is over the bride was a fanatic. The flowers came out very nice.