Turnsole

Turnsole was downgraded to a shading glaze and fell out of use in the illuminator's palette by the turn of the seventeenth century, with the easier availability of less fugitive mineral-derived blue pigments.

Textiles soaked in the dye vat would be left in a close damp cellar in an atmosphere produced by pans of urine.

The French Cook by François Pierre La Varenne (London 1653) mentions turnsole grated in water with a little powder of Iris.

[3] Herbals indicated that the plant grows on sunny, well-drained Mediterranean slopes and called it solsequium ("sun-follower") from its habit of turning its flowers to face the sun; alternatively it might be called "Greater Verucaria";[6] early botanical works gave it synonyms of Morella, Heliotropium tricoccum and Croton tinctorium.

Medicinal properties were ascribed to it in the first century AD by Dioscorides in De Materia Medica and also in medieval pharmacopoeia texts.