Senecio rowleyanus, colloquially known as "String of Beads" is a unique-looking succulent plant with thin, wiry stems that carry peas/pearls/beads shaped leaves along their, entire lengths. Cultivated in sunny windowsills or in hanging baskets it will rapidly form dense bunches of thin stems dangling over the edge of a pot.

Habit: It is a mat-forming perennial succulent with creeping shoots growing prostrate along the ground, but often trailing or pendent.
Stems: Very slender, thin, wiry, green 60-90 cm long. If it grows along the ground it can spread indefinitely. As it produces adventitious aerial roots that grow down where they make contact with soil.
Leaves: 5-8 mm in diameter, globose or depressed-globose, slightly elongated, with a short mucro (beak) at the end opposite the points of attachment to the stems. Shiny, light green with a narrow, light green window along their length. The succulent leaves are spherical to minimize surface area, thereby conserving water.
Inflorescence: 3-5 cm in diameter and brushlike lack the brilliant colorful ray florets that often characterize daisy flowers. Fertile florets tubular, dull white with mauve anthers and violet Style, and pleasantly cinnamon-scented.
Blooming season: From spring to autumn.
Watering: Water regularly during the growing season every weeks or so, making sure to drench and letting all the water drain out of the pot. If all the leaves fall off don't fret, stop watering and wait until it starts to grow again. Less water during winter months. In the rest period no high atmospheric humidity!! Care must be taken with watering as they tends to become swollen and untidy in growth habit if given too much water and shade.
Exposure: Grow in slight dappled shade including two to three hours a day of direct sunlight through the year, which encourages flowering and heavy leaf production.
Hardiness: Reputedly sensitive to frost , but less so if kept on the dry side prior to, and during, cold weather (hardy to -5° C for short periods). However some warmth throughout the year will increase the grower's success (minimum 5° to 8°C during rest season). It does not like hot weather and needs cool air with ample airflow.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz