Figure 3
Reconstruction of Siphonospermum simplex. Reproductive unit; reconstruction of a longitudinal section. Arrows 1: micropylar tube, 2: second (mostly sclerenchymatous) layer, 3: third (probably mostly parenchymatous) layer. Uninterrupted lines indicate morphological surfaces. The dashed line indicates the boundary between the second (mostly sclerenchymatous) layer and the third (probably mostly parenchymatous) layer. Drawing: Pollyanna von Knorring.