sentence: ) violet lathyrus tuberosus violet wild cress -- nasturtium officinalis '' biolair '' bitter vetch -- lathyrus tuberosus -- cairmeal bilberries fixed with alum yellow -- buidhe achlasan chaluim cille rhubarb yellow apple - tree , ash and buckthorn poplar and elm bog myrtle , roid ash roots teazle -- dipsacus fullonum -- lùs-an-fhùcadair / leadan bracken roots -- raineach mhòr cow weed tops and flowers of heather , erica , fraoch wild mignonette , reseda luteola , '' lus buidhe mòr '' , dried , reduced to powder and boiled .