bordered pit

A bordered pit is a specialized pit found in the cell walls of certain plants, particularly in gymnosperms. These pits have a unique structure where the secondary cell wall arches over the pit cavity, forming a rim. This feature is described as a "pit border".12

In plant anatomy, tracheids are the primary water-conducting cells in the xylem of vascular plants. In gymnosperms, which lack vessels, these tracheids have bordered pits. The structure of these pits, with their overhanging secondary walls, influences water movement within the plant. While tracheids have pits, vessel members in angiosperms have perforations that facilitate more efficient water conduction.13