hound's-tongue (cynoglossum officinale). leaf closeup

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