Can you help track down the rare British daffodils?

The Mrs R O Backhouse has a pinkish colour

If we started talking about the Mrs R O Backhouse and Sussex bonfire, would you know what we are talking about?

These are actually super rare varieties of daffodils.

They are on a list of varieties which are so unusual that experts are worried they could be lost forever unless they are found and looked after.

Gwen Hines, who is from the plant conservation charity Plant Heritage, said not only do daffs bring us joy in the springtime, but also in the future "they might be important for medicines for science".

Daffodils are the national flower of Wales and are often worn by people on St David's Day.

Most of the flowers are yellow, but they can also be white, orange and even salmon-pink.

They are thought to have been initially brought to Britain by the Romans and there is now around 27,000 different varieties.

The Royal Horticultural Society - or RHS - is asking for help in finding some of the rare and missing varieties that they are worried have been lost to history and science.

The Sussex bonfire variety hasn't been seen for at least 20 years

The charity is asking people to make a note of when and where they see the flowers this spring and tell them.

Dr Kálmán Könyves is one of the scientists working for the RHS, he says mapping out where they grow could help them to find out how they are responding to the changing climate.

Some of the rare varieties like the Sussex bonfire haven't been seen for at least 20 years.

Experts like Roger Parsons hope it is still growing in a garden somewhere, he says finding it could help "maintain those genes for future plant breeding".