purple flower of a bramble plant rubus ulmifolius surrounded by unripe green berries

aculeado aculeos background beauty berries biennial blackberries blanket botany bramble brambles closeup cluster colorful drupes early fleshy flora flower food fresh fruit glands green group leaf leaves morus natural nature nutrition pedatic perennial plant polydrupe prickly purple ripening rosaceas rosales rosoideae rubus sarmentosa season sepals species stem stingers summer surrounded ternadas thorns tissue ulmifolius unripe vegetables