The study focuses on tree diversity in the Pune Corporation Area (PCA) and nearby hills during 1999 and 2000. A total of 380 tree species were recorded, with two-thirds being cultivated exotics and one-third native. Although there were some losses of certain species due to human influences like cutting and fires, the overall floristic richness in the area remained relatively stable. Popular plantation trees are mostly exotic species, leading to a decline in local fruit tree populations over the last few decades. The study suggests the need for quantifying tree census data to make informed recommendations for conservation and management.