carduus England flower Great Britain natural nature plant prickle Prickly South Downs spine spiny summer Sussex thistle wild chronic clinic column drug drugs hospital implant implantation medicine medicines metal morphine morphine-pump pain port pump angry animal animals danger defense Hystricidae India karnataka krayker Mangalore Pilikula Porcupine quill risk rodent ruffled sharp spines Agavaceae agave Cacti cactus garden green plants prickles Spain spanish spikey spiky succulent trees xerophyte bearded claws dragon ear exotic eye head legs lizard mouth nose nostril pogona reptile scales thorns tropical book business communicate communication curve information library magazine office orange page paper read reference text texture volume words work aquatic breathe catch caught dead dying everglades fin fish fisherman fishing gill Gills panfish sport swamp tail blank blue brown carmine color light newton pages red spectrum variation violet white yellow Australian bushes edges flora foliage leaf leafed leaves protective shrubs spikes textures thick background desert painful pattern ribbed ball barrel cluster globe group sphere