The root anatomy of 12 Amaranthus taxa (Amaranthaceae) was studied. The internal structures were evaluated as an anatomical character to clarify the taxonomic complexity in the genus. Transactions of young roots of the studied species showed no variations. While the old roots examination revealed differences in the products of the secondary thickening and their distribution, also differences in the anomalous cambium products were detected. Twelve characters with 26 character stats were used to

more »

... enerate anatomical key using the DELTA key-generating programs. ª 2015 Production and hosting by Elsevier B.V. on behalf of Faculty of Agriculture, Ain Shams University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).