Gail of Clay and Limestone is celebrating wildflowers this week and I wanted to get in on the fun. Fortunately I have one wildflower in bloom here at the End of the Road, coltsfoot, coughwort or Tussilago farfara. I usually call it an 'herb' because of its medicinal uses. Its leaves are used in an infusion or to smoke, in both cases to cure a cough.  Of course the word 'herb' in its broadest sense means only a…