Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 132.

Norway, 14/07/1732, ¶691:

In bad times when there is nothing but ‘Spergula vera’ [Corn Spurrey] to be had in the field, the seed is collected, dried, cleaned and used with a small admixture of corn. It makes a dough that is black but good.