Project 2151: S. Y. Smith, R. A. Stockey, G. W. Rothwell, S. A. Little. 2017. A new species of Pityostrobus (Pinaceae) from the Cretaceous of California: moving towards understanding the Cretaceous radiation of Pinaceae. Journal of Systematic Palaeontology. 15 (1):69-81.
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transverse section of ovulate cone