And a search on google scholar unearthed this gem:
Cypresse Garlands are of great account at Funeralls amongst the gentiler sort, but Rosemary and Bayes are used by the Commons both at Funeralls and Weddings. They are all plants which fade not a good while after they are gathered and used (as I conceive) to intimate unto us, that the remembrance of the present solemnity might not dye presently, but be kept in minde for many yeares (Coles 1656, 64-5).The plan is to have two on each of the steps leading up to the front door. I've got five plants now that I started from seed
Coles, William. 1656 The Art of Simpling: An Introduction to the Knowledge and Gathering of Plants. London: Nathaniel Brook,.