J.
Jack-in-the-Pulpit. The name of a plant that blooms in early summer. The flowers have no corollas or calyxes, but grow clustered together on a long spike. The spike of flowers is surrounded by a large overarching bract.
Juan Fernandez, n. An island, west of Chili, in South America. It is said to be the island where Robinson Crusoe lived.
Jupiter, n. In Roman mythology, the chief of the gods. The eagle is his favorite bird, and he is often represented with a sheaf of thunderbolts in his hand.