👉 Crassolus is a type of plant that has large, flat seeds with a hard outer shell called a sepal. It grows in warm and humid environments like tropical regions or sub-Saharan Africa. Its leaves are sessile (not attached to a stem), which allows it to grow underground. Crassolus is also known for its ability to tolerate drought by producing seed pods that can be stored for long periods without losing their nutritional value.