Ключевые слова: abaxial, belarus flora, black background, botanical illustration, botanical science, botany, closeup, dryopteridaceae, dryopteris, dryopteris assimilis, dryopteris expansa, focus stacking, indusium, macro, nature, northern bucklerfern, northern wood fern, pinna, pinnule, plants, polypodiaceae, rachis, scale, sorus, spreading wood fern, virtual herbarium,