Can the flower bedstraw be eaten?

Galium verum (Lady's Bedstraw or Yellow Bedstraw), does have culinary uses, flowers were used to coagulate milk in cheese manufacture and, in Gloucestershire, to colour the cheese Double Gloucester. In Denmark, the plant (known locally as gul snerre) is traditionally used to infuse spirits, making the uniquely Danish drink 'bjæsk'.

Thus the flower is not poisonous in itself, however, as dried plants were used to stuff mattresses, as the coumarin scent of the plants acts as a flea killer, it may be best to avoid it unless you know how to process it to a culinary standard.