Life … Plants Vascular Plants Dicots Pinks, Cactuses, and Allies Cacti Coryphantha Rhinoceros Cactus species 873 observations Rhinoceros Cactus Coryphantha echinus Field notes Range United States Greener is more native, amber more introduced; paler is less certain. How this was decided Key traits Layer Shrubs Moisture Dry Water use Low Drought tolerant Yes Plant type Perennial Shrub From the Lady Bird Johnson Wildflower Center and USDA PLANTS. Close