echinocactus gruzon at the royal burlington botanic garden

cactus thorn botany nature closeup plant flora flower green succulent garden houseplant sharp spike prickly golden barrel drought exotic sunlight symmetry abstract color dirt greenhouse home lot tropical beauty decor detail floral island lanzarote pot natural pattern desert area echinocactus grusonii endangered species ball attribute condition threatened stage environment gruzon royal burlington botanic gruzona genus spherical cacti needles great length main feature accumulate water lives long time watering