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.