cactus thicket of prickly pear

background barb bloom blue botanical botany cactaceae cactus colorful danger day desert fig flora flowers green grower impenetrable impermeable impervious light natural nature nopal nutrition opuntia opuntie pathless pear peyote pin plant prickle prickly red sabra sharp sky southern spike spiked spiky spinney succulent tenon thicket thorn thorny vealy white