Painted with goldenrod, horsetail strobili, sumac, wild grape, buckthorn, acorns, avocado pits and some saffron.
I also did some blacking on this one with a standard fine tipped pen. The goldenrod goes on clear, but dries to a lovely bright yellow.
This is based on a photo from Vika Farm which beautifully illustrates how bees collect pollen of all colours, leading to both questions and answers about which flowers, trees, and shrubs the bees are harvesting from and when.