Moonlace

Moonlace is a native plant of Ogygia (oh-jee-jee-a) given to Percy Jackson by Calypso in The Battle of the Labyrinth. Percy lived with Calypso on Ogygia for a while, and Calypso makes Percy promise to plant a garden for her back in New York after learning that they had no flowers in Manhattan. After returning home to New York, he plants it in his mother's flower box and she takes care of it while he is away on quests at camp. At the end of The Battle of the Labyrinth while Percy is looking at it, Nico di Angelo startles him by commenting "nice plant." This plant is bioluminiscent, glowing silver and sprouts under moonlight. It seems to grow quickly when under his mother's care, as Percy remarks, for it was spreading quickly. Also, the book hints that it has to be night time for the flower to be planted. Calypso had Percy helping her planting the flowers in her garden. When Calypso gives Percy the silver flower, he says she will always be his biggest "What if?"