hounds-tongue (cynoglossum officinale). leaf closeup

belarus flora boraginaceae cynoglossum officinale abaxial acute leaf apex amplexicaul appressed hair black background botanical science botany cauline closeup dog 039 tongue entire margin focus stacking gypsy flower hound stongue houndstongue houndstooth indumentum lamina detail lanceolate blade vein macro nature oblong petiole plants sessile venation virtual herbarium papillose