. Fossil plants : for students of botany and geology . Paleobotany. Fig. 783. PUyostrohus (Pinites) macrocephalus. (After Gardner; nat. size.) i^2!^ ^ w-^^^^ ^^hL ''' pf^^ 1 ^ 1. Fig. 784. Piiyostrobus (Pinilea) macrocephalus. A, section of an ovule; n, nucellus. B, longitudinal section of part of the cone. (From sections in the British Museum; B, slightly reduced.) prothallus tent-pole of Ginkgo ovules: at its blunt apex are two winged pollen-grains. Prothallus-tissue is also represented. Carriithers compared the species with Pinus Pinaster but the. Please note that these images are extracte
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. Fossil plants : for students of botany and geology . Paleobotany. Fig. 783. PUyostrohus (Pinites) macrocephalus. (After Gardner; nat. size.) i^2!^ ^ w-^^^^ ^^hL ''' pf^^ 1 ^ 1. Fig. 784. Piiyostrobus (Pinilea) macrocephalus. A, section of an ovule; n, nucellus. B, longitudinal section of part of the cone. (From sections in the British Museum; B, slightly reduced.) prothallus tent-pole of Ginkgo ovules: at its blunt apex are two winged pollen-grains. Prothallus-tissue is also represented. Carriithers compared the species with Pinus Pinaster but the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press