Judges chose it for matching the criteria: a plant that makes you feel good, helps you to feel relaxed and is easy to maintain.
Rhipsalis was the majority choice of the panel of judges, which met at the end of June. The panel included garden designer Claudia de Yong, Matthew Appleby of Horticulture Week and author of the Flowerona blog, Rona Wheeldon.
Ian Drummond of Indoor Garden Design, one of efig's newly appointed ambassadors who hosted the judging, said: "With indoor plants making a big come-back everywhere this year, the Rhipsalis is a fascinating plant which creates interest and makes a good talking point.
"It's really easy to care for which makes it perfect for busy working spaces where bringing nature into the environment is good for health, wellbeing and productivity."
Meanwhile, National Plants at Work Week launches this week with a planted, mobile office in a London black cab.
As business men and women rush from one meeting to another they can finish off their preparations in the cab or conduct their meetings there.
"We all know that nature and green plants have very positive benefits for the working environment and all who use it, so a black cab is the perfect place to site a green mobile office," said Drummond.
Efig chairman Chris Jenkin, managing director of Enterprise Plants, added: "We are more used to planted installations in a traditional office. But technology doesn't stand still and neither should we.
"Ensuring that everywhere we work has a natural element is important not just for health but also for improved productivity and creativity. Research in recent years has supported these theories.
"One of the latest concepts, biophilia, is one that is several decades old. The theory is that we all need to connect with nature - it's in our genes. When we get this connection with nature is when we function best and bringing plants indoors is one of the simplest ways to do this."
Plant Designs is getting involved with National Plants at Work Week.
It said: "The recommendations for having plants in working environments are well backed up by research from around the world, indicating just how reliant we are on nature for our health and wellbeing. Our need for a connection with nature, or the Biophilia Hypothesis, is becoming increasingly important to consider as people spend so much time working indoors."