The red spike ice plant (Cephalophyllum alstonii) produces vibrant red flowers held just above the thick, fleshy, triangular leaves. A native of the Ceres Karoo in South Africa, this plant does not tolerate frost or excessive moisture. In its natural setting, the seeds (nutlets) are held in the fruiting capsule until the next rainfall event, during which they are forcibly ejected. It is a houseplant that can spend the summer outdoors in full sun or partial shade.