Abstract
Abstract Recent investigations of the microfloras of the Upper Carboniferous coal-seams of a part of the South Wales Coalfield have demonstrated the presence in these coals of pollen grains of typical Abietineous aspect referable to the genus Pityosporites Seward. A new species—P. westphalensis—is described. The grains are found distributed through the seam as part of the overall microflora and are not associated with any male fructifications or sporangia. However, on morphological grounds they are referable to the Coniferae and indicate the existence during late Carboniferous (Coal Measures) times of a group of conifers which quite probably were the early representatives of the Abietineae. The geographical and vertical distributions of Pityosporites in the British Coal Measures are given as far as they are known at present, and it is concluded that this hitherto unknown group of Coal Measures conifers made a small but nevertheless significant contribution to the floras of those times.
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