Ginkgoopsida - Ginkgoales - Ginkgoaceae

Leaves variable in size, long petiolate, fan shaped with a cunate base, divided by a sharp median sinus which extends f s to s of the distance to the base into 2 primary segments. Each of these is invariably divided by a sharp but less deep sinus into 2 equal round-tipped segments. In about half the specimens this represents the maximum dissection. In the remainder the outer segments are bisected to a greater or less degree. The leaf substance is fairly coriaceous and the veins are largely immersed. The veins are stout and the venation is typical of the genus, except the outer marginals are not so prominently differentiated as is usual in the existing Ginkgo biloba.

The petiole is stout and striated, slightly expanded at the base and measures 4 centimeters in length in the only complete specimen, in which the lamina is 5 centimeters long and about the same in maximum width. The cuticles are preserved in most of the specimens but had been allowed to dry and slack for several years before coming into my hands, and hence it has been impossible to make sufficiently good cuticular preparations for photographing. The cell outlines are quadrangular more often than polygonal ; the walls are wavy and rather heavily cuticularised.

Full reference: E. W. Berry. 1935. A Tertiary Ginkgo from Patagonia. Torreya 35(1):11-13

Belongs to Ginkgo according to E. W. Berry 1935

Sister taxa: Ginkgo acetaria, Ginkgo adiantoides, Ginkgo baynesiana, Ginkgo dawsoni, Ginkgo digitata, Ginkgo huttoni, Ginkgo laramiensis, Ginkgo lepida, Ginkgo lobata, Ginkgo nana, Ginkgo pluripartita, Ginkgo pusilla, Ginkgo rajmahalensis, Ginkgo sibirica, Ginkgo wyomingensis, Salisburia eocenica, Salisburia adiantoides

Distribution: found only at Rio Picheleufu (Eocene to Miocene of Argentina)

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Specimen images are retrieved through the ePANDDA API.