Pulvinus and pulvinar slits of D. paniculatum. A) Scheme of pulvini regions. B) Proposed model of pulvinar slits in the wall of a cortical motor cell (left). Section of calcofluor white-stained D. paniculatum pulvini visualized by confocal laser scanning microscopy (right). Bar, 20 µm. AdAb, adaxial–abaxial axis; ML, medial–lateral axis; PD, proximo-distal axis. B) was modified from Figure 1C and G of Takahara et al. (2023).