Geology and paleontology / by B.K. Emerson [and others].

Date:
[1910]
Catalogue details

Licence: In copyright

Credit: Geology and paleontology / by B.K. Emerson [and others]. Source: Wellcome Collection.

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    but probably in less abundance, was the species described as Picea harrimani, which is quite closely allied to the P. sitchensis now living in the region. There are branches which undoubtedly belong to a spruce, and a single seed which in all probability also belonged to a Picea. Scat- tered over many pieces of matrix are numerous short, thick coniferous leaves which may well have belonged to this species of Picea. The genus Pinus is more or less uncertain, but is apparently represented by several de- tached leaves 5 cm. or more in length, and scales that ap- pear to represent a broken pine cone. Sequoia evidently did not have a very prominent place in the flora, as it is represented only by a single cone that is referred to S. heerii of Lesquereux, and a much broken cone that may or may not be of the same species. The few branchlets referred to Taxodium tinajorum are hardly to be distin- guished from T. distichum miocenum and may be only more robust examples of the latter. The next most conspicuous family, in point of species as well as individuals, is the Betulacese. Betula itself is represented by a small but unmistakable fragment of the bark which shows the well-known lenticels. The most abundant dicotyledon in the collection is Corylus mac- quarrii, which is represented by leaves and fragments. Of the two species of Corylus described as new, C. har- rimani must have been a magnificent tree, with leaves 20 cm. in length and 17 cm. in width. Judging simply from the present collection, this was not a very abundant species. The somewhat anomalous leaves described as Corylus? palachei may or may not belong to this genus. The remaining members of the Betulaceae are two forms of Alnus, one of which (A. corylifolia) is represented by a considerable number of small, sharply serrate leaves. The Juglandacese are represented by a single species each of Juglans and Hicoria, the latter being a truly