No link, but I'm guessing, draw flowers with masking fluid, drop wet into wet colours, sprinkle salt, allow to dry, rub off masking fluid. It would work by drawing in the flowers with a fine white crayon I should imagine. Something I'm going to have a go at.
Floral/Still Life « Annelein Beukenkamp Watercolors
Carole DiTerlizzi - "Sunflower"
"Parfum de la Provence“ by Andrea Fettweis
Paris Roses Original Watercolor by Jane Gillette
Blueberry Sprig by Laura Moore
Art Original Watercolor Painting of Giant Russian Mammoth SUNFLOWERS