old man of the andes cactus in the greenhouse

america andes backeb binghamia britton cactaceae cacti cactus columnar dautwitzii ecuador edible espostoa flora fluffy fruit fur furry hair hairy lanata lima local macro man mountains nana native natural nature old peru peruvian pilocereus pseudoespostoa south species specimen spikes spiky study thrixanthocereus tips trichocereeae vatricania white