With quirky aerial roots and exotic flowers, epiphytic orchids are unlike any other houseplant. Find out how to care for them ...

Not all plants can be stored in a seed bank. Cryopreservation offers an alternative, but critics question whether this form of conservation will work.

Little is known about the relationship of epiphytes with their host plants, or more particularly, whether certain species of algal epiphytes are associated with certain species of macrophytes.