Viola glabella Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet) Viola glabella (pioneer, stream, or smooth yellow violet)