|MadSci Network: Botany|
Most people who clone plants for a living work in horticulture and practice grafting, tissue culture, rooting of cuttings, layering, or propagation via specialized structures such as bulbs, corms, and tubers. Among plants cloned are spring flower bulbs, such as tulips, daffodils and crocus and crops such as potatoes (specialized structures), most fruit and nut trees (grafting), many orchids and house plants (tissue culture) and carnations, poinsettias, and chrysanthemums (rooting of cuttings). There is an organization for plant propagators called the International Plant Propagators' Society. I guess one of the biggest misconceptions is that such a large percentage of cultivated plants are cloned. Reference Hartmann, H.T. and Kester, D.E. 1983. Plant Propagation: Principles and Practices. Englewood Cliffs, NJ: Prentice-Hall.
Try the links in the MadSci Library for more information on Botany.