BIOMETRIC AND MORHOLOGIC OBSERVATIONS ON SALIX FRAGILIS (SALICACEAE) LEAVES
The paper discloses a research model of leaf investigation, based on biometric measurements and morphologic observations. There are only a few examples of this type of biometric investigation model applied on spontaneous plants leaves in literature. The article comprises biometrical and morphologic investigations on 40 leaves of Salix fragilis L. The measurements and observations were performed on 40 mature leaves collected from the apex, middle and base of the crown, including linear measurements, percentage ratio, angular measurements and other measurements such as the number semi-sum of secondary pairs of veins (Np), the teeth number/cm and the lamina surface as well. The biometric measurements were the basis of a mathematical calculation of the average values on the studied species leaves.