Skip to main content
. 2009 Sep 16;104(6):1085–1098. doi: 10.1093/aob/mcp210

Fig. 3.

Fig. 3.

Onset and early development of vein orders in paradermal sections and clearings of leaves of C3 Flaveria robusta. (A) Young leaf showing central 1° vein procambium (1 mm). (B) Leaf showing onset of 2° vein procambium (1 mm). (C) Developing 2° vein procambium loops (1·5 mm). (D) Connection of 2° vein loops (2 mm). (E) Basal portion of leaf with lateral 1° vein procambium (2 mm). (F) Mid-portion of leaf with lateral 1° and 2° vein procambium (4 mm). (G) Onset of 3° veins branching from 2° veins (2 mm). (H) 3° vein mesh in mid-portion of leaf (4 mm). (I) Developing 3° vein procambium within a 2° vein loop (4 mm). (J) 4° minor veins branching from 3° veins in basal portion of leaf (8 mm). (K) Mid-portion of leaf with 3° and 4° minor vein procambium (4 mm). (L) 4° and 5° minor vein orders in mid-portion of leaf (5 mm). (M) Minor vein reticulum in mid-portion of leaf (8 mm). (N) Appearance of freely ending veinlets compared with connected minor veins (5 mm). Abbreviations: C1, central 1° vein; FEV, freely ending veinlet; L1, lateral 1° vein. Scale bars: all images = 100 µm.