agricultural pest cactus fast-spreading food fruit glochids green fruit green. moisture introduced nopales opuntia paddle cactus platyclades prickles prickly pear prickly pear cactus fruit spikes spines textures abundance abundant agricultural-pest edible edible-prickly-pear fruiting green green-fruit Indian-fig moisture opuntia-ficus-indica paddle-cactus perennial prickly-pear prickly-pear-cactus-fruit red ripe ripe-fruit weed black-seeds cactus-fruit climbing-cactus colorful colors colourful colours contrast cultivated decorative dragon-fruit exotic hylocereus-undatus juicy moist ornamental-plant pips pitahaya pitaya produce red-flesh red-skin seeds seedy shape shapes size smell strawberry-pear succulent-plant surface surfaces tasty texture textured unusual white-flesh appearance black seeds cactus fruit climbing cactus dragon fruit hylocereus undatus ornamental plant red skin Sizes strawberry pear white flesh blue canarian pear plant sky