Classification Of Leaves | All Global Updates

Classification of Leaves


·         External leaf characteristics (such as shape, margin, hairs, etc.) are important for identifying plant species

·         Leaves are determinant in growth i.e. they grow and achieve a specific pattern and shape, then stop

·         Other plant parts like stems or roots are non-determinant

·         Leaves are classified on the basis of:
§  Arrangement on the stem
§  Alternate, opposite, whorled, rosulate,
§  Divisions of the lamina 
§  Simple leaves, compound leaves (palmately compound leaves, pinnately compound leaves, binately compound leaves)
§  Leaf margin
§  Entire, ciliate, crenate, dentate, denticulate, doubly toothed, lobate, serrate, serrulate, lanceolate)
§  Leaf Apex
§  Acuminate, acute, cuspidate, ermaginate, obtuse, obcordate, mucronate,
§  Leaf base
§  Acuminte, acute, cordate, cuneate,
§  Surface of the leaf
§  Farinose, glabrouse, verucose, viscid, pubescent, hirsute, glandular)


Green Leaf Tree
§  Leaf Apex
§  Acuminate, acute, cuspidate, ermaginate, obtuse, obcordate, mucronate,
§  Leaf base
§  Acuminte, acute, cordate, cuneate,
§  Surface of the leaf
§  Farinose, glabrouse, verucose, viscid, pubescent, hirsute, glandular)

References
Evans, W. C. (2009). Trease and Evans Pharmacognosy. India: Reed Elsevier Limited.