After she does, Art pricks his finger, and squeezes a drop of blood onto the leaves.
The splatter of damp leaves sits wetly on the paper, and gradually the moisture leeches from the leaves, into the fabric of the page, pale green and red, diluting into pink spreading in a splotchy pattern.
He doesn't pass the pin to Gladiola, but is gazing at the... well, it just looks like a mess on the table to HER... but glamour stirs, and it is clear that Art is focusing on SOMETHING.