Spermatophyte plants that have unenclosed, "naked seeds": The fifth extant division is the flowering plants, also known as angiosperms or magnoliophytes, the largest and most diverse group of spermatophytes. Angiosperms possess seeds enclosed in a fruit, unlike gymnosperms. In addition to the taxa listed above, the fossil record contains evidence of many extinct taxa of seed plants. The so-called "seed ferns" (Pteridospermae) were one of the earliest successful groups of land plants, and forests dominated by seed ferns were prevalent in the late Paleozoic. "Glossopteris" was the most prominent tree genus in the ancient southern supercontinent of Gondwana during the Permian
Sub-provincial division other, regular prefecture-level divisions, which are completely ruled by their provinces. However, they are marked the same as other provincial capitals (or prefecture-level city if not provincial capital) in almost all maps. The original 16 municipalities were renamed as sub-provincial municipalities on 25 February 1994 by the Central Organization Committee out of prefecture-level municipalities. They are mostly the capitals of the provinces in which they are located. Currently, there are 15 sub-provincial municipalities after Chongqing was designated direct-control: Chongqing was formerly a sub-provincial municipality of Sichuan until 14 March 1997, when it was made an independent municipality by splitting it