FAMILY OF PLANT PLASTIDS. “In plants, the chloroplast is only one of a number of plastids that include proplastids, etioplasts, chromplasts, leucoplasts, amyloplasts, elaioplasts, proteinoplast or aleuronoplasts and gerontoplasts. These plastids display different morphologies, perform specialized functions and store various biochemical compounds during plant development. Under certain conditions, plastid types can interconvert.”
http://www.sciencedirect.com/science/article/pii/S0167488912002844