By ErastesI'm a keen gardener, and I'd often seen the genus Tradescantia on plants that I planted in my garden. I didn't know what that word meant for many years. I assumed it was from where the plants were from, or perhaps a particular thing about their genetics.

It wasn't until I read Philippa Gregory's Earthly Joys that I realised what it meant: it refers to the man who introduced these plants to the United Kingdom, John Tradescant.There were actually two John Tradescants--The Elder and the Younger. They were both obsessive plantsmen and brilliant gardeners.
The Elder John rose to fame as head gardener to the Earl of Salisbury at Hatfield House. An influential man at Court (Tradescant seems to hover around hugely influential men) and completely redesigned the gardens at Hatfield for the new house that Salisbury had built. These gardens were formal (unlike the broad sweeping "natural" landscapes that were later fashionable when Capability Brown came along) comprising mazes, knot gardens, water parterres and terraces.
John's son, John the Younger, travelled even more widely than his father, going as far as the Americas, and continued to collect plants and seeds to bring back to England, plants such as the magnolia, the tulip tree, and plants we take for granted such as aster and phlox. They displayed their finds in their house in Lambeth and charged the public to view them in what they called "The Ark." John the Younger became head gardener to Charles I, survived the civil war and was buried beside his father in Lambeth.