Ask Mr. Smarty Plants

This sounds very like a succulent that we have seen from time to time without knowing what it was. So, we went looking at succulents, and have found one that appears to match your description. Here is a page of images of Senecio rowleyanus; see if it matches your memory of the plant. Somewhat to our surprise, it is a member of the family Asteraceae, but when you see pictures of the flowers, you will see that they lack the ray-like florets that ordinarily appear in that family. It is sometimes called "string of beads" or "string of peas", and the round "beads" are actually leaves, adapted to conserve moisture during extreme periods of drouth. It is native to southwest Africa, and therefore a little out of the area of expertise of the Lady Bird Johnson Wildflower Center, which is dedicated to the care and propagation of plants native to North America. However, many indoor container plants are non-native subtropicals, which can adapt to the conditions of indoor living. Go to this website Plants to Grow to learn about its care and culture. Many nurseries carry a selection of succulents, or possibly you could order it by mail. Hope we found the right plant!