Kleinia Stapeliiformis, aka Pickle Cactus, Candle Stick Cactus or Senecio stapeliaeformis, is an interesting succulent with tiny leaves and pencil-like cylindrical stems. The stems are brittle and succulent, with soft spines along the sides. It can grow up to 10 inches long and you can shape its long stems into intricate shapes. White new growth, called rhizomes, sprouts from the stem underground, and then gain their dark green and silver colour when exposed to sunlight.