Plant subfamilies

Sequoioideae, commonly referred to as redwoods, is a subfamily of coniferous trees within the family Cupressaceae, that range in the northern hemisphere. It includes the largest and tallest trees in the world. The trees in the subfamily are amongst the most notable trees in the world and are common ornamental trees. The subfamily reached its peak of diversity during the early Cenozoic.

Hydnoroideae is a subfamily of parasitic flowering plants in the order Piperales. Traditionally, and as recently as the APG III system it given family rank under the name Hydnoraceae. It is now submerged in the Aristolochiaceae. It contains two genera, Hydnora and Prosopanche: Prosopanche is native to Central and South America; Hydnora can be found in semi-arid to desert regions of Africa, the Arabian Peninsula, and Madagascar.

Abietoideae is a subfamily of the conifer family Pinaceae. The name is from the genus Abies (firs), which contains most of the species in the genus. Six genera are currently assigned to this subfamily: Abies, Cedrus, Keteleeria, Nothotsuga, Pseudolarix, and Tsuga. The group was formerly treated as a separate family, the Abietaceae, by some plant taxonomy systems, such as the Wettstein system.

Taxodioideae is a subfamily in Cupressaceae. ==Genera== {| class="wikitable" |- ! Image !! Genus !! Living Species |- |120px||Taxodium || Taxodium ascendens Brongn. Taxodium distichum (L.) Rich. Taxodium mucronatum Ten. |- |120px||Glyptostrobus || Glyptostrobus pensilis (Staunton ex D.Don) K.Koch |- |120px||Cryptomeria || Cryptomeria japonica (L.f.) D.Don |- |}

REDIRECT Cupressaceae#Classification

Cheilanthoideae is one of the five subfamilies of the fern family Pteridaceae. The subfamily is understood to be monophyletic, but some of the genera as currently defined are not. Most species are xeric-adapted, and the subfamily is most diverse in dry areas.

The Laricoideae are a subfamily of the Pinaceae, a Pinophyta division family. They take their name from the genus Larix (larches), which contains inside most of the species of the group and is one of only two deciduous genera of the pines complex (together with Pseudolarix, which however belongs to a different subfamily, the Abietoideae). Ecologically important trees, the Laricoideae form pure or mixed forest associations often dominant in the ecosystems in which they are present, thanks also to their biological adaptations to natural disturbances, to reproductive strategies put in place and h

Pteridoideae is one of the five subfamilies of the fern family Pteridaceae. This subfamily contains about 14 genera and around 400 species.

Vittarioideae is a subfamily of the fern family Pteridaceae, in the order Polypodiales. The subfamily includes the previous families Adiantaceae (adiantoids or maidenhair ferns) and Vittariaceae (vittarioids or shoestring ferns).

Polypodioideae is a subfamily belonging to the fern family Polypodiaceae, which is a member of the suborder Polypodiineae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Alternatively, the subfamily may be treated as the tribe Polypodieae within a very broadly defined family Polypodiaceae sensu lato.

Lycopodioideae is a subfamily in the family Lycopodiaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is equivalent to a broad circumscription of the genus Lycopodium in other classifications. Like all lycophytes, members of the Lycopodioideae reproduce by spores. The oldest fossils of modern members of the subfamily date to the Early Cretaceous.

Cryptogrammoideae is a subfamily of ferns in the family Pteridaceae. The subfamily contains three genera and about 23 species.

Huperzioideae is a subfamily of lycopsids in the family Lycopodiaceae. It has sometimes been recognized as a separate family, Huperziaceae. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognizes three extant genera: Huperzia (temperate firmosses); about 25 species; terrestrial. Phlegmariurus (tropical firmosses); about 250 species; previously included in Huperzia; mainly epiphytes. Phylloglossum (pygmy clubmoss); formerly thought to be only distantly related to Huperzia. This is a terrestrial, grass-like plant with basal, 2–5 cm long, fleshy leaves. The only accepte