Earth Legend

Earth Legend is the third and last of the 'Legends' series. Each book in the series is a stand-alone story, complete in itself and related to the others only in that the story is based on a legend that turns out to be true.
Earth Legend tells the story of Elle Olmstead, descendant of Ceres, goddess of the harvest and fertility, who unwillingly stows away on the Destiny, a space ship filled with ten thousand people on their way to colonize a distant planet. She does so because she knows that her abilities are essential to keep the plants alive that keep the colonists alive and that will be the basis for their survival once they have reached their destination.
She's caught and thrown in prison, where her powers are useless. Soon the plants begin to shrivel and die. Starvation is imminent, not to mention that the plants provide essential oxygen. But no one believes her when she tells them who she is and what she can do.
Can she save the Destiny and, in the process, save herself? Or is everyone on the huge space ship doomed?