Leonardo's boat; when is a crocus not a crocus?

Yesterday we went by train to see our grandsons and their parents in Bedfordshire. We travelled from Birmingham New Street to Wolverton, where we were picked up by Ally.

I made possibly a small error in trying to get the cheapest advance tickets for the journey. Going was fine; we got the £6 fares (before railcard discount). But I couldn't find a £6 fare for the return journey, so we got £6 (before railcard) tickets from Wolverton to Berkswell, and £2.50 "evening day single" from Berkswell to Birmingham. No railcard discount seemed to be possible for the evening tickets. The actual journeys were fine - it was only after buying the tickets that I remembered that we could probably have got "£6" tickets from Wolverton to a station beyond New Street, such as Yardley Wood, a station I have used several times in the past. Then, of course, we could have just not bothered with the New Street to Yardley Wood part of the journey.

Today it has been raining a lot. We went to the city's Museum and Art Gallery to see the Leonardo 500 exhibition, a display of some of Leonardo da Vinci's drawings from the Royal Collection. In one he sketched a boat.

When is a crocus not a crocus? When CRT thinks it is a daffodil?

There were no crocuses to be seen. OK, they might all have finished and died back, but it does seem odd.