Euphorbia tirucalli, commonly known as the pencil cactus, is a succulent plant native to Africa and India. It features slender, green stems that resemble pencils, which can grow up to 30 feet tall. This plant thrives in dry, arid conditions and is often used in landscaping for its unique appearance. The pencil cactus produces a milky latex sap that can be toxic if ingested or if it comes into contact with skin. It is important to handle this plant with care. Euphorbia tirucalli is also known for its drought resistance, making it a popular choice for xeriscaping and low-water gardens.