abundance abundant agricultural-pest cactus edible edible-prickly-pear fast-spreading food fruit fruiting glochids green green-fruit Indian-fig introduced moisture nopales opuntia opuntia-ficus-indica paddle-cactus perennial platyclades prickles prickly-pear prickly-pear-cactus-fruit red ripe ripe-fruit spikes spines textures weed agricultural pest green fruit green. moisture paddle cactus prickly pear prickly pear cactus fruit fig fruits pear Prickly Cacti painful plant sharp thorns flower garden macro nature plants rose thorn thorny Arizona cacto desert kaktus southwest vegetation western animal Hedgehog needle rodent wild wildlife