Fig. 4.

Cross-sections of species from three of the four genera misplaced in Arundinoideae s.l. Black scale bars are approx. 500 μm. (A) Phaenanthoecium koestlinii (Wood 1305) showing schlerenchyma around the vascular bundles (grey arrow) and forming a cap at the leaf margins (black arrow). (B) Alloeochaete andongensis (Gossweiler 11810) has well-defined ribs around vascular bundles that form deep pits containing stomata (black arrow) and macrohair-like prickles (grey arrow, also in Fig. 5B). (C) Nematopoa longipes (Simon 2353) appears to be C₄ with small tertiary vascular bundles (black arrow) limiting the distance between bundle sheath cells.