Decorative plants for outdoors and interiors on gravel, pebbles, white crushed stone. Houseplants exotic plants tropical plants garden cactus Cereus - Cereus, Trichocereus garden cactus Echinocactus - echinocactus, hedgehog cactus tropical plants Yucca rostrata - beak yucca Barrel cactus Cacti, Yucca, landscaping, round cactus, Barrel cactus, dracaena, botanical garden, pebbles, white gravel