Table 1 Comparison among the flowers of pioneer Core Eudicots in the mid-Cretaceous (Albian-Cenomanian).
Symmetry | Gender | Sepal | Petal | Stamen | Filament | Pollen sac | Pollen grain | Floral cup | Ovary | Placentation | Carpel | Style | Preservation media | Locality | Reference | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lijinganthus revoluta | actinomorphic | bisexual | 5, free | 5, free, revolute | 8(10?), dorsifixed, introse | slender | 2 | tricolpate | None | superior | axile | 3, fused | amber | Burma | This study | |
Dakotanthus cordiformis | actinomorphic | bisexual | 5, free | 5, free, spatulate | 10?, dorsifixed | stout | 4 | tricolporate | superior | axile | 5, fused | siltstone | USA | Manchester et al.27 | ||
Lachnociona terriae | actinomorphic | unisexual | 5, free | none | 10 | slender | present | superi, half-inferior | 5, fused or not | connivent | Amber | Burma | Poinar et al.19 | |||
Tropidogyne pentaptera | actinomorphic | bisexual | 5, slightly fused | 0 | 5? dorsifixed | short, slender | present | inferior | 2, fused | 2 | amber | Burma | Poinar et al.28 | |||
Eoȅpigynia burmensis | actinomorphic | bisexual | 4, fused | 4, free, valvate | 4, dorsifixed, introse | slender | ? | tricolporate? | present | inferior | ? | fused | amber | Burma | Poinar et al.18 | |
Caliciflora mauldinensis | actinomorphic | Bisexual | 5, free, revolute-valvate | 5, free, keeled-conduplic-ate | 8, dorsifixed | short or none | 4 | tricolporate | present | superior | marginal? | 3, free | siltstone | USA | Friis et al.26 |
