Fig. 2

Lateral organ laminar growth diversity and adaxial–abaxial patterning. Primordia and mature shapes are shown in longitudinal midline sections (expect for the bifacial leaf) and the known and hypothesized adaxial and abaxial domains are depicted in blue and yellow, respectively. A Bifacial laminar leaf. B Peltate leaf. C Elaborate peltate petal. D Epiascidiate leaf-like Sarracenia traps. E Epiascidiate leaf-like Utricularia traps. F Ancestral ascidiate carpel structure, reconstructed based on the carpels found in the species of early diverging angiosperm lineages (based on Doyle 2008) [15]. Adaxial and abaxial domains are shaded to reflect a hypothetical unconfirmed distribution