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 agricultural-pest arum-lilies arum-lily bush bushland calla-lily childsiana color colour death-lily declared-pest dense-clumps funeral-flower green-goddess herbaceous invasive lifestock-threat lily-of-the-Nile out-of-control pasture-invader perennial pig-lily spreading St-Joseph's-lily surface surfaces surfacing texture textured thick-fleshy-leaf-blades toxic varkblom weed white-arum-lily zantedeschia-aethiopica abundance abundant edible edible-prickly-pear fruiting green green-fruit Indian-fig moisture opuntia-ficus-indica paddle-cactus prickly-pear prickly-pear-cactus-fruit red ripe ripe-fruit