Viola glabela 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)