This panel is based on the second/third half of the story where Narcissus finally sees his true self and kills himself due to him getting frustrated because he couldn't have possession over his own reflection. The red flowers represent when his blood went across the Earth.
Ergo Narcissus, pavore perterritus est.
"I need a break from everyone!"
Videt Narcissus suam, primum semper
WOW! This is a beautiful person! I must have them in my possession immediately! But they won't come!
Narcissi qui constituit sibi mortem. Sed omne quod est seorsum a facie maledictionis luxit!