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. 2023 Jan 9;13:426. doi: 10.1038/s41598-022-27334-0

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Nanjinganthus dendrostyla. PB22281. (a) A coalified laterally compressed flower with ovary (o), sepal (s), and petals (p), embedded in siltstone. Reproduced from Fu et al.¹. Scale bar = 1 mm. (b) Detailed view of the basal portion of the flower shown in (a), showing clear border (triangles) between the sediment and ovary roof, exposed through dégagement. Scale bar = 0.5 mm. (c) SEM view of the portion shown in (b). Scale bar = 0.5 mm. (d) Detailed view of the rectangular region in (c), showing the ovary roof (between triangles) secluding the ovary from the exterior. Scale bar = 0.1 mm.