I think I would go with Tuberose.
This is what Chanbers says:
* a Mexican amaryllid (Polianthes tuberosa) grown for its fragrant creamy-white flowers, propagated by tubers
This would indicate that for tuberosa you would need the full Latin name of Polianthes tuberosa. Most Telegraph answers are checked with Chambers.
Failing that, you could email Telegraph enquiries (telegraphenquiries at telegraph.co.uk). If nothing else,it will draw it to their attention.