Crassula plants, also known as jade plants or money trees, are a genus of succulent plants that are native to southern Africa and Madagascar. They are known for their thick, fleshy leaves and stems, which are adapted to store water in arid environments.

Crassula plants come in a variety of shapes and sizes, from low-growing ground covers to small, compact shrubs. Their leaves are typically small and oval-shaped, and can be smooth or slightly rough to the touch. Many species of Crassula have attractive, colorful leaves that are variegated with shades of green, red, and yellow.

Crassula plants are also known for their delicate, star-shaped flowers, which are typically white or pink in color. The flowers are borne on tall stems that rise above the foliage, and can bloom at any time of year.

Crassula plants are easy to care for and can be grown indoors or outdoors in a sunny, well-draining location. They prefer soil that is slightly acidic and can be prone to root rot if over-watered, so it's important to allow the soil to dry out between waterings. With the right care, Crassula plants can live for many years and can make beautiful additions to any succulent garden or indoor plant collection.