Anther common wildflower that we see in Minnesota is Verbascum Thapsus, otherwise known as common mullein. Common mullein is a stalk type plant which grows up from a base of rosette leaves. The stalk is packed with small yellow five petal flowers only a few of which open at any one time. Although it is an invasive species, it is originally from Europe where it is called great mullein, it is not very aggressive. This may be because it is intolerant of shade from neighboring plants.