the structure of the surface of the back side of a green leaf, thick and thin veins, green background

green leaf structure plant nature pattern surface botany organic foliage texture back vein background closeup environment fresh natural summer tree close color detail ecology floral abstract isolated shape textured life lines photosynthesis armoracia rusticana side bottom sheet cochlearia diaphanous garden grass herb herblore khren kitchen science underside upside down botanical food thick thin veins