A nearly-allied form (_Sequoia Langsdorffi_) has been
detected in the leaf-bed of Ardtun, in the Hebrides.
In Greenland, as well as in other parts of the Arctic regions,
Miocene strata have been discovered which have yielded a great
number of plants, many of which are identical with species found
in the European Miocene. Amongst these plants are found many
trees, such as Conifers, Beeches, Oaks, Maples, Plane-trees,
Walnuts, Magnolias, &c., with numerous shrubs, ferns, and other
smaller plants. With regard to the Miocene flora of the Arctic
regions, Sir Charles Lyell remarks that "more than thirty species
of Coniferae have been found, including several Sequoias (allied
to the gigantic Wellingtonia of California), with species of
_Thujopsis_ and _Salisburia_, now peculiar to Japan. There are
also beeches, oaks, planes, poplars, maples, walnuts, limes, and
even a magnolia, two cones of which have recently been obtained,
proving that this splendid evergreen not only lived but ripened
its fruit within the Arctic circle. Many of the limes, planes,
and oaks were large-leaved species; and both flowers and fruits,
besides immense quantities of leaves, are in many cases preserved.
Among the shrubs are many evergreens, as _Andromeda_, and two
extinct genera, _Daphnogene_ and _M'Clintockia_, with fine leathery
leaves, together with hazel, blackthorn, holly, logwood, and
hawthorn.
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