The Flapjack Succulent (Kalanchoe luciae) is also known as a Paddle Plant because of the paddle or clam-like shape of its leaves that form in rosette clusters.
Flapjacks can grow quickly in wide clusters and work well for xeriscape landscapes or rock gardens in regions prone to droughts. Once mature, these plants can produce yellow shaded flowers in the spring, and the wide, thick, fleshy leaves can take on a striking red tinge around the edges in winter. This is why it's sometimes also referred to as the Red Pancake.
Source: The Spruce