I am a succulent known for my unique appearance, often resembling a string of beads or pearls. My small, round leaves store water, allowing me to thrive in arid environments. I am often used in hanging baskets. What am I?

1. My leaves are spherical and grow along a trailing stem.
2. I'm a popular choice for indoor plants and require very little maintenance.
3. I am native to Southwest Africa.
4. I'm sometimes mistaken for peas, but I'm definitely not edible.