Show time: "Ask a pelargonium grower to explain what a pelargonium is, they tend to get a bit excited. The import of their reply is that whatever a pelargonium is, it isn't a geranium (just to confuse things, the American word for pelargonium is 'geranium'). How do you tell the difference? The simplest method seems to be to put the plant in question outside on a frosty evening and go to bed."
