الفهرس 
SCOPE OF THE THESISOnly 14 pages are availabe for public view
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Abstract
The present work is devoted to investigate the macro and micromorphological characters of vegetative organs (petiole & leaf blade) of 19 species in family Araceae. The different diagnostic key characters are presented in the form of cwnulative tables in order to facilitate observation of variation, similarities and differentiations among the studied species. Also, the chromosome nwnber was studied; in addition the leaf proteins of nineteen species were studied using SDS-PAGE technique.
In this work the results were analyzed using nwnerical methods.
The main conclusions can be summarized as follows:
1- An artificial key is constructed on the basis of macro- &
micromorphological characters of vegetative organs. It is evident from this key that the most diagnostic features in macromorphological attributes are: leaf shapes and its colors, petiole color, type of leaf apex and type of stem. Also the most diagnostic features in micromorphological attributes are: occurrence of laticifer and its type, type of crystals, presence or absence of spicular cells (tricosclereids), .occurrence of resin canal and occurrence of sclerenchyma.
2- The present study confirms the usefulness of the macro and micromorphological attributes as valid taxonomic criteria to identification and differentiate between the taxa studied.