I have been monitoring the annual survival of this rare plant at Northiam for four years now in an attempt to understand what restricts the distribution of the plant in Britain. Observations over the past year have been particularly informative.
The past two summers have been very wet, and have coincided with very poor survival of germinating seedlings. Only 50 survived in 2007 on a limestone bed that has been regularly monitored, whereas in 2008 only 22 were found. In the preceeding years thousands of plants had been found in this area and back in November I was wondering if the population might be on a steady track towards extinction.
The past winter, however, has seen remarkably good Read the rest of this entry »