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As Q. hiholensis was the first oak to be described from anatomically preserved acorns, they chose to place the fossils into a new species rather than describe them as fossils belonging to the living species, or acorns belonging to an already described fossil species. [1]
Fossil oaks date back to the Middle Eocene. Molecular phylogeny shows that the genus is divided into Old World and New World clades, but many oak species hybridise freely, making the genus's history difficult to resolve. Ecologically, oaks are keystone species in habitats from Mediterranean semi-desert to subtropical rainforest.
This species is a relict. Though it is now limited to the islands, it was once widespread in mainland California, as evidenced by the many late Tertiary fossils of the species found there. [5] Recently, it was found that there was a high genetic variability across many of the Q. tomentella populations, but this variation was not evenly ...
It always occurs in mixed forests along with other tree species. Quercus hartwissiana prefers warm and humid climate and grows on fresh to moist soil from the lowland to an altitude of 1,200 to 1,500 m (3,900 to 4,900 ft). [1] It is a pre-glacial relict and is considered to be the ancestor of Quercus robur and Quercus petraea. [3]
Quercus trojana, the Macedonian oak is an oak in the turkey oak section (Quercus sect. Cerris).. It is native to southeast Europe and southwest Asia, from southern Italy east across the southern Balkans (Croatia, Albania, Serbia, North Macedonia and Greece) to western Turkey, growing at low to moderate altitudes (up to 1,550 metres or 5,090 feet in the south of the range in southwestern Turkey ...
Fossil evidence shows that Engelmann oaks once had a wider range, extending through what is now the Mojave and Sonoran deserts into eastern California and Arizona. The Engelmann oak is most closely related to the Arizona white oak (Q. arizonica) and Arizona blue oak (Q. oblongifolia) , which are native to the subtropical pine-oak woodlands of ...
Quercus stellata, the post oak or iron oak, is a North American species of oak in the white oak section. It is a slow-growing oak that lives in dry areas on the edges of fields, tops of ridges, and also grows in poor soils, and is resistant to rot, fire, and drought. Interbreeding occurs among white oaks, thus many hybrid species combinations ...
Quercus suber, commonly called the cork oak, is a medium-sized, evergreen oak tree in the section Quercus sect. Cerris.It is the primary source of cork for wine bottle stoppers and other uses, such as cork flooring and as the cores of cricket balls.