Guardian: Spring is currently in limbo with few signs of wild flowers. The perishing cold has stopped lots of plants in their tracks, although there have also been some benefits, with snowdrops and crocuses enjoying an unexpectedly long flowering season. And when the weather was a lot milder earlier in March, the very earliest spring flowers managed to get going, such as colt's foot, which looks like a dandelion, and lesser celandine, a golden star-shaped flower and cousin of the buttercup. The lesser celandine...