Tree collecting is becoming a conservation mission with plenty eager to sign up
Of all the things you might amass, trees would have to be one of the most unwieldy. They take up space and they soak up time. It's not a pursuit for the restless. But it's hard to keep a good tree collector from grouping trunks and canopies, foliage and flowers. Their plantations spill over hectares and change with the seasons.
In 1838 the pioneering Scottish botanist and garden designer John Claudius Loudon came up with a name for such a collection: "arboretum". The term stuck.