cristata cactus, mammillaria spinosissima. cactus on pebble background. close up green cactus

angiosperms background beautiful botanical botany cactaceae cacti cactoideae cactus caryophyllales close closeup cushion desert detail dome dry flower garden gravel green mammillaria natural nature one organic painful pin pincushion plant plantae prickly rocks sharp singapore single small spherical spiky spinosissima spiny succulent texture thorns tracheophytes tree tropical