Developmental anatomy and the anomalous structure of the stem in Aloe arborescens Morphological and anatomical studies on the leaves of four species of Aloe Anatomy, Histochemistry and Phytochemistry of Aloe arborescens Leaves According to Leaf-age Development of Vascular Bundles in Aloe arborescens Leaves Structural analysis and aloin determination in leaves of Aloe arborescens at different Developmental and anatomical studies on the leaves of Aloearborescens KARYOTYPE ANALYSIS OF ALOE FEROX MILLER AND ALOE ARBORESCENS MILLER