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SOME ADDITIONAL NOTES ON MALE GYMNOSPERM FRUCTIFICATIONS FROM THE JURASSIC FLORA OF YORKSHIRE
Author(s) -
Van KonijnenburgVan Cittert Johanna H.A.
Publication year - 1972
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1972.tb00751.x
Subject(s) - gymnosperm , herbarium , flora (microbiology) , art , art history , geography , archaeology , classics , history , paleontology , biology , bacteria
This paper is an addendum to the author’s (1971) paper. At the time that the latter paper was finished, there were difficulties in taking photographs of the newly described male fructifications. Subsequently those difficulties have been solved, and the present paper contains the photographs of the male fructifications of the type specimens of Hastystrobus muirii v. Kon., Masculostrobus harrisii v. Kon., and Pityanthus scalbiensis v. Kon., and the photographs of the male fructifications, as described in the above-mentioned paper, of Ginkgo huttoni (Heer) Sternberg and Brachyphyllum crucis Kendall. All specimens are preserved in the Division of Palaeobotany and Palynology, Botanical Museum and Herbarium, State University, Utrecht, The Netherlands. Most of the photographs were taken with the specimens illuminated obliquely in air, but some were taken with the specimens flooded with oil. This procedure is generally applied when the specimen requires enhancement of contrast, so that details are more evident than if the specimen was photographed dry.