Nielsen's (1969) article in the last issue of this Newsletter motivated me to write the following comments. It was not because he criticized numerical taxonomy (NT), but rather, in my opinion, he criticized aspects of NT that either a) no longer need to be criticized, or b) are not the fault of the methods of numerical taxonomy but of the people who use them, in this case, Steward (1968). Like ...

malaria has reemerged in northern borderline of iran after the collapse of former soviet :union:. there have been several reports of malaria epidemics in azerbaijan and ardebil provinces of iran. the anopheles maculipennis complex is assumed to play an important role in malaria transmission in these regions. for the first time in iran, a diagnostic character in 4th instar larvae, i.e. seta 2 (a...

Numerical taxonomy and seed storage protein analysis of Hyoscyamus species of Iran was carried out with the aim to illustrate species inter-relationship and to check the sub-generic taxonomic treatment proposed for the genus. Cluster analysis of morphological and protein data grouped the species in three separate clusters which supports the relationships of H. niger with H. reticulatus and H. k...

Due to increasing importance of desertification challenges and its consequences the necessity of sustainabledevelopment achievement in arid and semi-arid regions is essential in order to avoid limited sources asting, increase the efficiency of controlling, reclamation and restoration projects of natural areas. Based on the iterature review, it has been recognized that combating desertification ...