Hatiora salicornioides is one of the most rewarding plants to grow. They are an epiphytic jungle cactus native to South America. They have a very interesting growing pattern, their stems are contorted.
Since they are a jungle cactus they prefer bright indirect light. Water when first 2" of the soil is dry. This is typically once every 10-14 days, they're not too drought tolerant. They do prefer nice coarse mix, so their root system does not stay wet for too long.