Coniferophyta
(pines, cypresses, yellowwoods, etc)
Life
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Archaeoplastida >
Chloroplastida
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> Gymnospermae
Families encountered in southern Africa
Araucariaceae
(monkeypuzzle family) Three genera (Wollemia,
Agathis and
Araucaria) and 41 living
species, distributed in the Southern Hemisphere but not native to
Africa. Fossils have been found dating back to the Jurassic and the family
was once more widespread, occurring in both hemispheres. [Is there any
fossil material from Africa?]. Species of Agathis and Araucaria
are cultivated in urban areas of southern Africa as garden and roadside
trees. The genus Wollemia contains a single species Wollemia
nobilis, which is considered the most basal species in the Araucariaceae
family tree and which, amazingly, was discovered as recently as 1994 in New
South Wales, Australia. As far as is known, it has not yet been cultivated
in southern Africa. |
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Cephalotaxaceae
Closely related to the Taxaceae. Includes only the genus Cephalotaxus which is found from
India to China and Japan. |
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Cupressaceae
(cypresses) |
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Pinaceae (pines)
There are about 12 genera and 200 species, almost
exclusively native to the northern hemisphere. Many species of pines
(genus Pinus) have been cultivated in southern Africa, of which eight
have become naturalised. |
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Podocarpaceae
(yellowoods) |
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Sciadopityaceae
Includes only the
species, Sciadopitys verticillata (Japanese umbrella pine),
which is found in Japan. |
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Taxaceae (Yew family) Five genera and 17
species, mainly occurring in the Northern Hemisphere. Two species in the
genus Taxus have been cultivated in southern Africa: Taxus baccata
(European yew, Common yew) and Taxus canadensis (Canada yew,
Amercian yew). |
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Gnetales
[= Gnetopsida, Gnetophyta]
Includes the families Ephedraceae (with one genus:
Ephedra), Gnetaceae (with two genera: Gnetum and
Vinkiella) and Welwitschiaceae (one genus: Welwitschia), of
which only the latter occurs in southern Africa. The Gnetales used to be
regarded as the sister group of the angiosperms but through molecular studies,
the evidence now points to it lying within the Coniferophyta (Simpson, 2006).
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