Managathi forest of Ariyalur district, Tamilnadu was explored for the floristic studies and life form spectrum. It covers an area 32ha. Totally 141Angiosprmic plant species represented by 105 genera belonging to 49 families and the habit wise distribution of plants species dominance of herb 48 (28.36%)followed by shrub 38 species (26.95%), trees 36 species (25.53%)and climber 27 species (19.14%) were recorded. Life form spectrum revealed the dominance of Phanerophytes (55.31%) and these were followed by the Therophytes (35.46%), Chameophytes (14.63%), Hemicryprophytes (2.83%) and Cryptophytes (2.12%). Phanerophytes were found higher than the normal biological spectrum which indicated that study area prevailing environment. Some rare plants are confined these forest.