Cupid's Flower

Oberon witnesses Helena's pleas for Demtrius' love.

He sends Puck to use the flower on the sleeping eyes of Demetrius, just as he will use it on Titania. The effect will be that the one who is touched by it will love the first creature they see upon waking.

Oberon applies the flower to the eyes of Titania...

But Puck mistakenly applies the flower to Lysander, instead of Demetrius.