Softwood systematics

On the basis of these sites:
http://www.floridata.com/ref/p/pinu_thu.cfm
http://www.floridata.com/sc.htm
Orde Coniferales

• Familie Araucariaceae
  family of 2 genera and 32 species, including Norfolk Island Pine and monkey puzzle tree
• Familie Cephalotaxaceae
  7 species of plum-yews in a single genus
• Familie Cupressaceae
  17 genera with about 120 species including Monterey cypress, the junipers and American arborvitae
• Familie Podocarpaceae
  seven genera with about 100 species including the Japanese yews
• Familie Taxaceae
  the true yews such as Florida yew and torreya
• Familie Taxodiaceae
  an ancient family with 10 genera and including such species as baldcypress, California redwood and dawn redwood
• Familie Pinaceae
  Genus pinus, 110 species
  Picea, the spruces
  Abies, the firs
  Cedrus, the cedars
  Keteleeria, a genus of three obscure fir-like species from SE Asia
  Larix, the larches
  Pseudotsuga, the Douglas firs
  Tsuga, the hemlocks
  Nothotsuga, Cathaya and Pseudolarix, three obscure monotypic genera from China
  

Some authorities place the families Taxaceae, Cephalotaxaceae and Podocarpaceae in a separate order, Taxales, and some authorities include the family Taxodiaceae within Cupressaceae.