Wild Tulip in Yorkshire and Sweden

摘要

The Wild Tulip Tulipa sylvestris is a bulbous perennial of open woodlands, orchards, hedgerows, riversides, chalk pits, grassy banks and waste ground. Populations can arise from discarded bulbs, deliberate planting in the wild or relics of cultivation. In Western Europe it is commonly found in orchards and vineyards where it thrives on disturbances to the soil. In such situations it is sometimes described as invasive. Wild Tulip also grows in woodland but, although it thrives, spreading rapidly by underground stolons, it rarely flowers well. It may grow in old churchyards, but again flowers little until these grounds are cleared and dug over, disturbance of the ground stimulating flowering. It grows some 35cm tall with bold clear yellow flowers andis tetraploid, having double the normal number of chromosomes, a factor which may account for its vigour.