Willow Identification Key: Leaves hairless at maturity Leaves hairless at maturity Leaves finely toothed, 0.8-1.25 cm wide Leaves finely toothed, 0.8-1.25 cm wide, long drawn out tip, bright green above, lighter green beneath; female catkins Leaves coarsely toothed, 1.25-2 cm wide Leaves coarsely toothed, 1.25-2 cm wide, 7.5-17.5 cm long with a less drawn out tip, dark green above, light green to bluish green beneath, shoots shiny brown; male catkins.