Pinus, the Pines, is a genus of approximately 111 extant tree and shrub species. The genus is currently split into two subgenera, subgenus Pinus (Diploxylon pines or Hard pines), and subgenus Strobus (Haploxylon pines or Soft pines). Each of the subgenera have several sections within based on chloroplast DNA sequencing. Older classifications split the genus with three subgenera, Pinus (Pinus), Pinus (Strobus), and Pinus (Ducampopinus) (Pinyon, Bristlecone and Lacebark pines)physical morphology of based on cone, seed and leaf characters. DNA phylogeny has shown that Pinus (Ducampopinus) species are members of Pinus (Strobus), and the subgenus Pinus (Ducampopinus) is no longer used.