Moses-in-the-Cradle Oyster plant is a clumping, broadleaf evergreen, herbaceous perennial houseplant in the spiderwort family (Commelinaceae). Its native range is southern Mexico to Guatemala. It grows 6 inches to 1 foot tall and 1 to 2 feet wide. It was formerly known as Rhoeo spathacea and is still found listed under that name. The specific epithet, spathacea, means "with a spathe." This references the spathe-like or boat-shaped bracts that hold the flowers.