Figure 4 from: Van Waveren IM (2019) A morphometric analysis of Tobleria bicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia). PhytoKeys 119: 67-95. https://doi.org/10.3897/phytokeys.119.29555

Figure 4 Diagram showing empty scale, opaque (A1) or lighter (A2), fertile units as dark discs (B1) or dark circular rims (B2), and fertile scale with lighter fertile units on darker scale (C1) or darker fertile units on lighter scale (C2) (see also Figure 6). It is indicated how length and width of scale and fertile unit are measured.