Subclass Order FamilyCycadidae 苏铁亚纲Cycadales苏铁目Cycadaceae 苏铁科1属90种Stangeriaceae 托叶铁科2属3种Zamiaceae 泽米铁科8属100种Ginkgoidae 银杏亚纲Ginkgoales银杏目Ginkgoaceae 银杏科1属1种Gnetidae 麻黄亚纲Welwitschiales百岁兰目Welwitschiaceae百岁兰科1属1种Gnetales买麻藤目Gnetaceae 买麻藤科1属ca.40种Ephedrales麻黄目Ephedraceae 麻黄科1属32种Pinidae 松柏亚纲Pinales松目Pinaceae 松科11属232种Araucariales南洋杉目Araucariaceae 南洋杉科3属40种Podocarpaceae 罗汉松科18属173种Cupressales柏目Sciadopityaceae 金松科1属1种Cupressaceae 柏科27属142种Taxaceae 紫杉科6属28种Cycadidae苏铁亚纲Cycadaceae苏铁科：The sole genus in Cycadaceae Persoon苏铁属。

In this treatment there are 90 species. Stangeriaceae托叶铁科：The family includes three species in the two generaStangeria蕨铁属 in the subfamily Stangerioideae, andBowenia波温铁属in the subfamily Bowenioideae (Jones 1993).Zamiaceae泽米铁科：A family of eight genera and about 100 species, subdivided as follows: Subfamily Tribe Subtribe GenusEncephalartoideae 非洲铁亚科Diooeae双子铁族Dioon双子铁属Encephalarteae非洲铁族Encephalartinae非洲铁亚族Encephalartos非洲铁属Macrozamiinae澳洲铁亚族Macrozamia大泽米铁属Lepidozamia铁属Zamioideae泽米亚科Ceratozamieae角状铁族Ceratozamia角状泽米属Zamieae泽米族Microcycadinae小苏铁亚族Microcycas小苏铁亚属Zamiinae泽米亚族Zamia泽米铁属Chigua奇寡铁属Ginkgoidae银杏亚纲Ginkgoaceae银杏科：This is one of the most relict species on earth, alone in its subclass (Ginkgoidae Engler 1897), order (Gingkgoales Gorozh. 1904), family (Ginkgoaceae Engler 1897), and genus (Ginkgo Linnaeus 1771).Gnetidae麻黄亚纲Ephedraceae麻黄科：The sole genus of Ephedraceae is Ephedra麻黄属。

Welwitschiaceae百岁兰科：The sole species Welwitschia百岁兰属Gnetaceae买麻藤科：There are about 40 species in one genus, Gnetum。

Section（组）Subsection SpeciesGnetum 买麻藤组Gnetum G. gnemon and one other Indomalesian tree species （2）Micrognemones Two species of African lianas（2）AraeognemonesNine species of Neotropical lianas（9）Cylindrostachys About 19 species of Asian and Indomalesian lianas, incl.G. arboreum, G. contractum, G. cuspidatum, G. diminutum, G. gnemonoides, G.hainanense, G. klossii, G. latifolium, G. leptostachyum, G. loerzingii, G.macrostachyum, G. microcarpum, G. montanum, G. neglectum, G. oxycarpum, G.ridleyi, G. ula, and two other species.（19）Pinidae松柏亚纲Pinales松柏目Pinaceae松科：There are here treated 11 genera and 232 species：Abies冷杉属Cathaya银杉属Cedrus雪松属Keteleeria油杉属Larix落叶松属Nothotsuga长苞铁杉属Picea云杉属Pinus松属Pseudolarix金钱松属Pseudotsuga黄杉属Tsuga铁杉属Araucariales南洋杉目Araucariaceae 南洋杉科：Three genera with 40 species. The genera include: Agathis贝壳杉属Araucaria南洋杉属Wollemia瓦勒迈属Podocarpaceae罗汉松科：In this treatment, 173 species in 18 genera:∙Acmopyle铁门杉属，绒袍杉属∙Afrocarpus非洲罗汉松属，非洲杉属∙Dacrycarpus鸡毛松属∙Dacrydium陆均松属∙Falcatifolium镰状松属，镰叶杉属∙Halocarpus哈罗果松属，白袍杉属Lagarostrobos泪柏属，泣松属∙Lepidothamnus黄银松属，沼银松属∙Manoao白银松属∙Microcachrys寒寿松属∙Nageia竹柏属∙Parasitaxus寄生松属∙Pherosphaera小泣松属∙Phyllocladus芹叶松属∙Podocarpus罗汉松属∙Prumnopitys浆果罗汉松属，核果杉属∙Retrophyllum转叶罗汉松属，扭叶杉属∙Saxegothaea智利杉属，卓杉属Cupressales柏目Cupressaceae柏科：A family of twenty-seven (many monotypic) genera and 142 species。

Actinostrobus西澳洲柏属 Athrotaxis密叶杉属Austrocedrus南美柏属Callitris澳洲柏属Calocedrus翠柏属Chamaecyparis扁柏属Cryptomeria柳杉属Cunninghamia杉木属Cupressus柏木属Diselma塔斯曼柏属Fitzroya智利柏属Glyptostrobus水松属Juniperus圆柏属Libocedrus甜柏属Metasequoia水杉属Microbiota海参威柏属Neocallitropsis杉叶柏属Papuacedrus巴布亚柏属Platycladus侧柏属Sequoia红杉属Sequoiadendron巨杉属Taiwania台湾杉属Taxodium落羽杉属Tetraclinis香漆柏属Thuja崖柏属Thujopsis罗汉柏属Widdringtonia南非柏属Sciadopityaceae金松科：The sole species。

金松属Taxaceae紫杉科：A family of 6 genera and 28 species, mainly in the northern hemisphere: ∙Amentotaxus穗花杉属∙Austrotaxus南紫杉属∙Cephalotaxus三尖杉属∙Pseudotaxus白豆杉属∙Taxus红豆杉属Torreya榧属Taxodiaceae杉科，之前指10属：∙Athrotaxis 密叶杉属∙Cryptomeria柳杉属∙Cunninghamia杉木属∙†Cunninghamites∙Glyptostrobus水松属∙Metasequoia水杉属∙Sciadopitys金松属∙Sequoia红杉属∙Sequoiadendron巨杉属∙Taiwania台湾杉属∙Taxodium落羽杉属Cycadaceae苏铁科：Cycas苏铁属Stangeriaceae托叶铁科Stangeria蕨铁属Zamiaceae泽米铁科Dioon双子铁属Encephalartos非洲铁属Macrozamia大泽米铁属Lepidozamia铁属Ceratozamia角状泽米属Microcycas小苏铁亚属Zamia泽米铁属Chigua奇寡铁属Ginkgoaceae银杏科Ginkgo银杏属Ephedraceae麻黄科Ephedra麻黄属Welwitschiaceae百岁兰科Welwitschia百岁兰属Gnetaceae买麻藤科Gnetum买麻藤属Pinaceae松科Abies冷杉属Cathaya银杉属Cedrus雪松Keteleeria油杉属Larix落叶松属Nothotsuga长苞铁杉属Picea云杉属Pinus松属Pseudolarix金钱松属Pseudotsuga黄杉属Tsuga铁杉属Araucariaceae 南洋杉科Agathis贝壳杉属Araucaria南洋杉属Wollemia瓦勒迈属Podocarpaceae罗汉松科Acmopyle铁门杉属，绒袍杉属Afrocarpus非洲罗汉松属，非洲杉属Dacrycarpus鸡毛松属Dacrydium陆均松属Falcatifolium镰状松属，镰叶杉属Halocarpus哈罗果松属，白袍杉属Lagarostrobos泪柏属，泣松属Lepidothamnus黄银松属，沼银松属Manoao白银松属Microcachrys寒寿松属Nageia竹柏属Parasitaxus寄生松属Pherosphaera小泣松属Phyllocladus芹叶松属Podocarpus罗汉松属Prumnopitys浆果罗汉松属，核果杉属Retrophyllum转叶罗汉松属，扭叶杉属Saxegothaea智利杉属，卓杉属Cupressaceae柏科Actinostrobus西澳洲柏属Athrotaxis密叶杉属Austrocedrus南美柏属Callitris澳洲柏属Calocedrus 翠柏属Chamaecyparis扁柏属Cryptomeria柳杉属Cunninghamia杉木属Cupressus柏木属Diselma塔斯曼柏属Fitzroya智利柏属Glyptostrobus水松属Juniperus圆柏属Libocedrus甜柏属Metasequoia水杉属Microbiota海参威柏属Neocallitropsis杉叶柏属Papuacedrus巴布亚柏属Platycladus侧柏属Sequoia 红杉属Sequoiadendron巨杉属Taiwania台湾杉属Taxodium落羽杉属Tetraclinis香漆柏属Thuja崖柏属Thujopsis罗汉柏属Widdringtonia南非柏属Sciadopityaceae金松科Sciadopityaceae金松属Taxaceae紫杉科Amentotaxus穗花杉属Austrotaxus南紫杉属Cephalotaxus三尖杉属Pseudotaxus白豆杉属Taxus红豆杉属Torreya榧属。