Fig. 4

Transverse sections of leaf blade (a–f) and leaf margin (g–l). a, g A. breviscapa, b, h A. kerrii, c, i A. suddeeana, d, j A. variabilis, e, k Argyreia 1 and f, l Argyreia 2 (ds dark-staining deposit, ep epidermal cell, pc palisade cell, sc spongy cell, tr trichome, vt vascular tissue). Scale bar 100 µm