We have discovered that we made an error in our article “Leaf Evolution and Development: Advancing Technologies, Advancing Understanding” (BioScience 59: 17–26). In figure 4, we show a sample of the range of leaf morphologies represented in the pea mutant collection. Unfortunately, we inaccurately identified the mutants in some of the panels. The figure legend should read as follows: “Figure 4. A sample of the range of leaf morphologies represented in the pea mutant collection, (a) The nanal mutant has miniaturized leaves and fewer pairs of leaflets and tendrils, (b) the afila/crispa double mutant exhibits a range of abnormal morphologies, and (c) the unifoliata mutant and the uni/afila double mutant show terminal leaflets and truncated development. The uni mutants alone show reduced levels of dissection, while the double mutants reverse that slightly; (d) the upper two leaves are from wild-type plants and the lower are uni-tac, a less severe mutation at the uni locus. Images provided by Darleen DeMason, University of California, Riverside. Scale bar = 1 centimeter in (a) and (c), and 2 centimeters in (b) and (d).”

We sincerely regret the mistake.