There are 126 species of true pine plus some three dozen experts can't make up their minds about. The Norfolk Island Pine is not one of these. In fact, botanically it is not a pine at all.
Instead it is an exceedingly popular houseplant, so much so that in Britain it is often sold under the name of 'House Pine.' In North America, tens of thousands are raised in Florida for the foliage plant trade. There they are named after their native home substituted towards December every year by 'Tropical Christmas Tree.' This is preferable since, unlike true pines, it will not tolerate cold temperatures, although its requirements are by no means tropical. Indeed, it will flourish in temperatures 21ºC days down to 13ºC at night.