appearance cluster clustering-succulent distinctive five-petalled flower flowering foliage hardy indoor-plant mottled outdoor-plant perennial pot-plant stapelia-variegata star-shape star-shaped starflower sturdy succulent succulents variable variations variegated variety various fleshy leaves nature plant pointed sharp spiny green greenery potplant tendril banana leaf bloom grow cactus fat fat plant flowerpot water pebble stones yard garden halophyte natural rosette stone wall xerophyte