<p><span style="font-size:14px"><span style="font-family:Arial,Helvetica,sans-serif"><em>Knema </em>Phytosociological studies have been carried out in a Myristica swamp in Northern Kerala to reveal the composition and distribution pattern of different tree species. On the basis of IVI, the family Myristicaceae was dominant and the association is <em>attenuata </em>- <em>Myristica malabarica </em>-<em>Holigarna arnottiana </em>type. The species like <em>Gymnacranthera canarica</em> and <em>Myristica fatua</em> var. <em>magnifica</em>, which are believed to be the essential elements of Myristica swamps, are totally absent here. A total 403 individuals (gbh <u>></u> 10.1 cm) were recorded with a basal area of 34.25 m²ha^-1in 0.5 ha. area. <strong> </strong>Total number of species recorded was 28, which represent 21families in which Myristicaceae represents 48.18% of total IVI. Among two dominant species, <em>Myristica malabarica</em> prefer swampy area hence their number of individual shows decreasing trend when we move from the swamp while the second dominant species <em>Knema attenuata</em> showing a reverse trend and was completely absent in the first five quadrats where soil water content is too high. Species specific eco-physiological studies are required to understand the reasons for change in the distribution pattern of these dominant species.</span></span></p>