Lithops bromfieldii var. insularis
Lithops, commonly known as "Living Stones," are succulent plants from South Africa and Namibia. While they are primarily grown for their interesting form and color, (they indeed look like small, colorful stones), they also produce attractive flowers. Lithops are "short day" plants. They produce their flowers in the late summer through late fall, as the hours of daylight grow shorter and shorter. As September comes to a close it's the species Lithops bromfieldii, and its varieties, that are in the midst of their flowering period.
The plant shown above is actually two 4-headed plants I potted together to fill a 4 inch square (10 x 10 cm) pot and provide a more attractive display. I grew the two 4-headed plants from seed sown in 2004. My lithops spend the summer outside in full sun, but under a cover of clear plastic to control the amount of water they receive. In the winter they all come inside the house to a sunny, south facing windowsill. I've been growing lithops for quite a few years, but it is always a great thrill to watch them produce their bright, cheerful flowers in the fall.