STUDY ON NUMERICAL TAXONOMY OF ULMACEAE PLANTS FROM SOUTH CHINA

This paper deals with the numerical taxonomy of Ulmaceae plants all from south China. All the taxa were divided into 30 operational units(OTU).The 42 characters used for analysis included moophological,anatomical,chemical and pollen morphological characters.Seven methods of systematic clustering were used:shortest distance,longest distance,median distance,centre of gravity,square sum of devia-tions,class average and variable. The results were not very consistent with the classical taxonomy. The variety Aphananthe aspera var. pubescens should be concelled;the species Trema dielsiana H.-M.should be restored;the taxonomical position of the species Aphananthe cuspidata(B1.)Pl.should be studied further.