I only buy modern toilet rolls when the leaves have all been plucked." Plectranthus barbatus is a green, leafy plant that grows quickly and up to six-and-a-half feet tall in only one to two months.

Alan Paton, Assistant Keeper of Kew's Herbarium, describes some of the problems associated with plant names and the importance of the new release of The Plant List. How do I communicate about plants?