The Wab1 leaf blade is very narrow. A, From top to bottom: wild-type leaf, Wab1/+ leaf, and Wab1/Wab1 leaf. B, Leaf width of wild-type blade (gray bar) versus Wab1/+ blade (black bar) measured at the base of the blade (B) and the midpoint of the length of the blade (M) for leaves 8, 10, and 16 (leaf 8 being the eighth leaf initiated). C, Number of lateral veins in wild-type blade (gray bar) versus Wab1/+ blade (black bar) counted at the base of the blade and the midpoint of the length of the blade for leaf 10. Cleared leaves stained in safranin to show lateral veins of Wab1/+ (D), wild type (E), lg2-R (F), and eta-R (G). Arrow in D points to lateral vein in the sheath that does not continue into the blade.