Figure 1.

Nanjinganthus dendrostyla and its ovules within the ovary. PB22279. All scale bar = 1 mm. (a) Top-down view of the coalified compression, with an ovary (o) in the centre and one of the petals (p) peeling off from the sediments. The outlines of petals and ovary are marked with broken lines. Reproduced from Fu et al.⁶. (b) Integral ovary roof, with cracks due to preservation. (c–g) are micro-CT virtual sections. Reproduced from Fu et al.⁶. (c) Vertical section showing two ovules (black arrows) covered by the ovary roof (white arrow). (d,e) Two transverse sections showing one oval ovule within the ovary, refer to the inset, in which an ovule is grey in colour. (f,g) Two transverse sections showing another truncate-cuneate ovule in the ovary, refer to the inset, in which an ovule is grey in color.