FIGURE 6 in Comparative anatomy of young stems and leaves of 16 Dalbergia species (Fabaceae) from Madagascar and their taxonomic significance

FIGURE 6. Cross-sections in the midrib, shape, vascularization and type of bundle sheath. A. Dalbergia lemurica, flat-flat, flat arc and bundle sheath type I on abaxial side of vascular bundle. B. D. abrahamii, flat-slightly convex, flat arc and bundle sheath type I partially surrounds the vascular bundle, inset show the large parenchyma cells, thin-walled, irregularly shaped. C. D. obtusa, slightly-fat convex, U-shaped vascular bundle and bundle sheath type II completely surrounds the vascular bundle. Inset shows the parenchyma cells, thickwalled, round shaped. D. D. razakamalalae, flat-convex, U-shaped and bundle sheath type II partially surrounds the vascular bundle. E. D. baronii, flat-strongly convex, V-shaped, bundle sheath type I partially surrounds the vascular bundle. F. D. purpurascens, slightly convex-convex, flat arc, bundle sheath type I at left and right sides of vascular bundle. G. D. bathiei, concave-convex, V-shaped, bundle sheath type I almost completely surrounds the vascular bundle. H. D. pseudobaronii, strongly concave-convex, flat arc and bundle sheath type I completely surrounds the vascular bundle. BSh.I: Bundle sheath type I, BSh.II: Bundle sheath type II.