1) Coniferous trees 2) Gymnosperm family 3) Redwood family 4) Subfamily taxodiaceae 
The Taxodiaceae were at one time regarded as a distinct plant family comprising the following ten genera of coniferous trees: However, recent research has shown that the Taxodiaceae, with the single exception of Sciadopitys, should be merged into the family Cupressaceae. There are no consistent characters by which they can be separated, and geneti...
(from the article `gymnosperm`) Modern families of conifers began to appear in the Mesozoic era. Members of the Taxodiaceae, the family to which redwoods and bald cypress are ...
[n] - coniferous trees
subfamily Taxodiaceae noun coniferous trees; traditionally considered an independent family though recently included in Cupressaceae in some classification systems